Description
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | KVM | Fixed-In v5.14-rc7 and above | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.14.6-1 | — |
| Debian 13 | linux | 5.14.6-1 | — |
| Debian 12 | linux | 5.14.6-1 | — |
| Debian 11 | linux | 5.10.46-5 | DSA-4978-1 |
| Debian 9 | linux-4.19 | 4.19.208-1~deb9u1 | DLA-2785-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-84.94 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1056.59 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-aws-5.11 +1 | 5.11.0-1017.18~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-aws-5.8 +4 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1058.60 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-azure-5.11 | 5.11.0-1015.16~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-azure-5.8 | 5.8.0-1041.44~20.04.1 | USN-5072-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1019.22 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1052.56 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | 5.11.0-1018.20~20.04.2 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1052.55 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1023.24 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | 5.11.0-34.36~20.04.1 | USN-5070-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1046.48 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1045.47 | USN-5072-1 |
| Ubuntu 20.04 LTS | linux-oem-5.13 | 5.13.0-1012.16 | USN-5082-1 |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1054.58 | USN-5071-1 |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | 5.11.0-1018.19~20.04.2 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-156.163 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1111.118 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1056.59~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1123.136 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1058.60~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1027.32 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1108.122 | USN-5073-2 |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1052.56~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1052.55~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1023.24~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-84.94~18.04.1 | USN-5071-2 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1099.101 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1080.88 | USN-5073-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1054.58~18.04.1 | USN-5071-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1112.121 | USN-5073-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1033.38 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2053.55 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2035.39 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1069.78 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2018.20 | — |
| Ubuntu Pro 20.04 LTS | linux | 5.4.0-84.94 | LSN-0081-1 |
| Ubuntu Pro 20.04 LTS | linux-gcp | 5.4.0-1052.56 | LSN-0081-1 |
| Ubuntu Pro 20.04 LTS | linux-gke | 5.4.0-1052.55 | LSN-0081-1 |
| Ubuntu Pro 20.04 LTS | linux-gkeop | 5.4.0-1023.24 | LSN-0081-1 |
| Ubuntu Pro 18.04 LTS | linux | 4.15.0-156.163 | LSN-0081-1 |
| Ubuntu Pro 18.04 LTS | linux-gke-5.4 | 5.4.0-1052.55~18.04.1 | LSN-0081-1 |
| Ubuntu Pro 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1023.24~18.04.1 | LSN-0081-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-84.94~18.04.1 | LSN-0081-1 |
| Ubuntu Pro 18.04 LTS | linux-oem +1 | No fix yet | LSN-0081-1 |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-214.246 | LSN-0081-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1111.118~16.04.1 | USN-5073-1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1123.136~16.04.1 | USN-5073-1 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1108.122~16.04.1 | USN-5073-2 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-156.163~16.04.1 | USN-5073-1, LSN-0081-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1080.88~16.04.1 | USN-5073-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1123.136~14.04.1 | USN-5073-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-214.246~14.04.1 | LSN-0081-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-305.25.1.rt7.97.el8_4 | RHSA-2021:4088 |
| RHEL 8 | perf +26 | 4.18.0-305.25.1.el8_4 | RHSA-2021:4056 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.45.1.rt56.1185.el7 | RHSA-2021:3802 |
| RHEL 7 | perf +18 | 3.10.0-1160.45.1.el7 | RHSA-2021:3801 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | kernel-rt +12 | 4.18.0-193.68.1.rt13.118.el8_2 | RHSA-2021:3909 |
| RHEL 8.2 EUS | perf +27 | 4.18.0-193.68.1.el8_2 | RHSA-2021:3904 |
| RHEL 8.1 EUS | perf +28 | 4.18.0-147.56.1.el8_1 | RHSA-2021:3676 |
| RHEL 7.7 TUS | perf +12 | 3.10.0-1062.59.1.el7 | RHSA-2021:3987 |
| RHEL 7.7 E4S | perf +14 | 3.10.0-1062.59.1.el7 | RHSA-2021:3987 |
| RHEL 7.7 AUS | perf +12 | 3.10.0-1062.59.1.el7 | RHSA-2021:3987 |
| RHEL 7.6 TUS | perf +12 | 3.10.0-957.84.1.el7 | RHSA-2021:3812 |
| RHEL 7.6 E4S | perf +13 | 3.10.0-957.84.1.el7 | RHSA-2021:3812 |
| RHEL 7.6 AUS | perf +12 | 3.10.0-957.84.1.el7 | RHSA-2021:3812 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-305.25.1.el8_4 | ALSA-2021:4056 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-305.25.1.el8_4 | RLSA-2021:4056 |
| Rocky Linux 8 | kernel-rt | 4.18.0-305.25.1.rt7.97.el8_4 | RLSA-2021:4088 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-59.24.1 | SUSE-SU-2021:3205-1 |
| SLES 15 SP3 | kernel-azure | 5.3.18-38.22.2 | SUSE-SU-2021:3179-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-59.24.1.18.12.1 | SUSE-SU-2021:3205-1 |
| SLES 15 SP3 | kernel-syms-azure +1 | 5.3.18-38.22.1 | SUSE-SU-2021:3179-1 |
| SLES 15 SP2 | kernel-azure | 5.3.18-18.66.2 | SUSE-SU-2021:3178-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.83.2.9.38.3 | SUSE-SU-2021:3207-1 |
| SLES 15 SP2 | kernel-docs +3 | 5.3.18-24.83.2 | SUSE-SU-2021:3207-1 |
| SLES 15 SP2 | kernel-syms +1 | 5.3.18-24.83.1 | SUSE-SU-2021:3207-1 |
| SLES 15 SP2 | kernel-syms-azure +1 | 5.3.18-18.66.1 | SUSE-SU-2021:3178-1 |
| SLES 15 SP1 | kernel-docs +4 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES 15 | kernel-syms +4 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES 12 SP5 | kernel-azure | 4.12.14-16.73.2 | SUSE-SU-2021:3192-1 |
| SLES 12 SP5 | kernel-docs +3 | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.88.2 | SUSE-SU-2021:3206-1 |
| SLES 12 SP5 | kernel-syms-azure +1 | 4.12.14-16.73.1 | SUSE-SU-2021:3192-1 |
Show 21 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES for SAP 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLES for SAP 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLES for SAP 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLES for SAP 12 SP5 | kernel-azure | 4.12.14-16.73.2 | SUSE-SU-2021:3192-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLES for SAP 12 SP5 | kernel-syms-azure +1 | 4.12.14-16.73.1 | SUSE-SU-2021:3192-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Real Time 12 SP5 | kernel-rt +1 | 4.12.14-10.57.2 | SUSE-SU-2021:3217-1 |
| SLE Real Time 12 SP5 | kernel-syms-rt +1 | 4.12.14-10.57.1 | SUSE-SU-2021:3217-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-59.24.1 | SUSE-SU-2021:3205-2 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-59.24.1.18.12.1 | SUSE-SU-2021:3205-2 |
| SLE Micro 5.1 | kernel-rt | 5.3.18-57.1 | SUSE-SU-2021:3415-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.83.2 | SUSE-SU-2021:3207-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.83.2.9.38.3 | SUSE-SU-2021:3207-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-51.2 | SUSE-SU-2021:3177-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-59.24.1 | SUSE-SU-2021:3205-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_6 | 1-7.5.1 | SUSE-SU-2021:3205-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.83.2 | SUSE-SU-2021:3207-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_19 | 1-5.3.4 | SUSE-SU-2021:3207-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_15 | 14-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_16 | 13-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_17 +1 | 12-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_19 +2 | 11-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_22 | 10-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_23 | 9-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_24 | 6-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_25 | 5-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_26 | 3-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_27 | 1-3.3.1 | SUSE-SU-2021:3876-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_20 | 14-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_21 | 12-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_22 | 10-2.3 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_23 | 9-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_24 | 6-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_25 | 3-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_26 | 1-1.3.1 | SUSE-SU-2021:3969-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.88.1 | SUSE-SU-2021:3206-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_10 | 15-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_11 +1 | 13-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_13 +1 | 11-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_15 | 10-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_16 | 9-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_17 | 7-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_18 | 6-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_19 +1 | 4-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_21 | 3-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_22 | 2-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_23 | 1-8.5.1 | SUSE-SU-2021:3206-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_9 | 16-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_16 | 14-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_17 | 11-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_18 | 10-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_19 | 9-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_20 | 6-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_21 | 5-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_22 | 3-2.2 | SUSE-SU-2021:3073-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_23 | 1-6.3.1 | SUSE-SU-2021:3972-1 |
| SLE HPC 15 SP1 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 SP1 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
| SLE HPC 15 | kernel-docs +1 | 4.12.14-150.78.2 | SUSE-SU-2021:3969-1 |
| SLE HPC 15 | kernel-syms +3 | 4.12.14-150.78.1 | SUSE-SU-2021:3969-1 |
| SUSE Real Time Module 15 SP3 | kernel-rt +3 | 5.3.18-57.1 | SUSE-SU-2021:3415-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +1 | 5.3.18-51.2 | SUSE-SU-2021:3177-1 |
| SUSE Real Time Module 15 SP2 | kernel-syms-rt +1 | 5.3.18-51.1 | SUSE-SU-2021:3177-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE Enterprise Storage 6 | kernel-docs +3 | 4.12.14-197.102.2 | SUSE-SU-2021:3876-1 |
| SUSE Enterprise Storage 6 | kernel-obs-build | 4.12.14-197.102.1 | SUSE-SU-2021:3876-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
| openSUSE Leap 15.3 | dtb-aarch64 +7 | 5.3.18-59.24.1 | openSUSE-SU-2021:3205-1 |
| openSUSE Leap 15.3 | kernel-azure | 5.3.18-38.22.2 | openSUSE-SU-2021:3179-1 |
| openSUSE Leap 15.3 | kernel-debug +4 | 4.12.14-197.102.2 | openSUSE-SU-2021:3876-1, openSUSE-SU-2021:3205-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.24.1.18.12.1 | openSUSE-SU-2021:3205-1 |
| openSUSE Leap 15.3 | kernel-syms-azure +1 | 5.3.18-38.22.1 | openSUSE-SU-2021:3179-1 |
| openSUSE Leap 15.2 | kernel-debug +5 | 5.3.18-lp152.92.2 | openSUSE-SU-2021:1271-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.92.2.lp152.8.42.3 | openSUSE-SU-2021:1271-1 |
| openSUSE Leap 15.2 | kernel-docs +2 | 5.3.18-lp152.92.1 | openSUSE-SU-2021:1271-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.246-187.474 | 1.0-0.amzn2 | ALAS2-2021-1704 |
| Amazon Linux 2 | perf +8 | 4.14.246-187.474.amzn2 | ALAS2-2021-1704 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-305.25.1.el8_4 | ELSA-2021-4056 |
| Oracle Linux 7 | kernel-uek +8 | 4.14.35-2047.506.10.el7uek | ELSA-2022-9244, ELSA-2021-9564, ELSA-2021-9452 |
| Oracle Linux 7 | kernel-uek-container | 4.14.35-2047.506.10.el7 | ELSA-2022-9245, ELSA-2021-9565, ELSA-2021-9453 |
| Oracle Linux 7 | kernel-uek-container-debug | 5.4.17-2102.204.4.3.el8 | ELSA-2022-9245, ELSA-2021-9565, ELSA-2021-9451 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.45.1.el7 | ELSA-2022-9244, ELSA-2021-9564, ELSA-2021-9452 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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rami08448/CVE-2021-3656-Demo ★ 2 · Nov 5, 2022
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 50
- ALSA-2021:4056 Important: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:3987 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2021:3812 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2021:3801 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2021:4056 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:4088 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:3904 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:3909 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:3802 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:3676 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-5073-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-hwe, linux-kvm, linux-oracle, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5073-2 linux-gcp, linux-gcp-4.15 vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5070-1 linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5071-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5082-1 linux-oem-5.13 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5071-2 linux-hwe-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5072-1 linux-azure-5.8, linux-oem-5.10 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- LSN-0081-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4978-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2785-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:4056 Important: kernel security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2021:4088 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2021:3179-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3217-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3179-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3205-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3969-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3205-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3415-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3177-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3207-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3972-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3192-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3178-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1271-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3073-1 Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3876-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0063 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2025
- SUSE-SU-2021:3206-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2021:3205-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-2065 Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Sep 27, 2023
- ELSA-2022-9244 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 23, 2022
- ELSA-2022-9245 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 23, 2022
- ELSA-2021-9564 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 23, 2021
- ELSA-2021-9565 Important: Unbreakable Enterprise kernel-container security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 23, 2021
- ELSA-2021-4056 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 3, 2021
- ELSA-2021-3801 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 12, 2021