Description
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occur before a store operation that has an attacker-controlled value.
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 | 5.10.46-4 | — |
| Debian 13 | linux | 5.10.46-4 | — |
| Debian 12 | linux | 5.10.46-4 | — |
| 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 | 5.4.0-90.101 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1059.62 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-aws-5.11 +1 | 5.11.0-1019.20~20.04.1 | USN-5092-2, USN-5092-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1063.66 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-azure-5.11 | 5.11.0-1017.18~20.04.1 | USN-5092-2 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1021.24 | USN-5137-2 |
| Ubuntu 20.04 LTS | linux-gcp +1 | 5.4.0-1057.61 | USN-5137-2, USN-5137-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | 5.11.0-1020.22~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1055.58 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1026.27 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | 5.11.0-37.41~20.04.2 | USN-5092-2 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1007.8 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1049.51 | USN-5137-1 |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1050.52 | USN-5115-1 |
| Ubuntu 20.04 LTS | linux-oem-5.13 | 5.13.0-1014.18 | USN-5096-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1046.50 | USN-5137-2 |
| Ubuntu 20.04 LTS | linux-riscv +8 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | 5.11.0-1020.21~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1059.62~18.04.1 | USN-5137-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1063.66~18.04.1 | USN-5137-1 |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 +1 | 5.4.0-1057.61~18.04.1 | USN-5137-2, USN-5137-1 |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1055.58~18.04.1 | USN-5137-2 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1026.27~18.04.1 | USN-5137-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-90.101~18.04.1 | USN-5137-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1046.50~18.04.1 | USN-5137-2 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 10 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 16.04 LTS | linux-fips | 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 | 5.4.0-1036.42 | — |
| 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-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1114.123~20.04.1 | — |
| Ubuntu Pro 18.04 LTS | linux +5 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux +3 | No fix yet | — |
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-docs +3 | 4.12.14-122.88.1 | SUSE-SU-2021:3748-1, SUSE-SU-2021:3206-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.88.2 | SUSE-SU-2021:3748-1, SUSE-SU-2021:3206-1 |
Show 28 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 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.161.1 | SUSE-SU-2021:3929-1 |
| 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-syms +2 | 4.12.14-122.88.1 | SUSE-SU-2021:3748-1, SUSE-SU-2021:3206-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SLE Real Time 12 SP5 | kernel-rt +1 | 4.12.14-10.57.2 | SUSE-SU-2021:3723-1, SUSE-SU-2021:3217-1 |
| SLE Real Time 12 SP5 | kernel-syms-rt +1 | 4.12.14-10.57.1 | SUSE-SU-2021:3723-1, SUSE-SU-2021:3217-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.82.1 | SUSE-SU-2025:0229-1 |
| 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_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_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-2021:3748-1, SUSE-SU-2021:3206-1 |
| 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_25 | 1-8.7.1 | SUSE-SU-2021:3748-1 |
| 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_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 Crowbar 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.83.2 | SUSE-SU-2021:3972-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.150.1 | SUSE-SU-2021:3935-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_41 | 1-4.3.1 | SUSE-SU-2021:3935-1 |
| 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 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-2021:1477-1, openSUSE-SU-2021:1271-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.92.2.lp152.8.42.3 | openSUSE-SU-2021:1477-1, openSUSE-SU-2021:1271-1 |
| openSUSE Leap 15.2 | kernel-docs +2 | 5.3.18-lp152.92.1 | openSUSE-SU-2021:1477-1, openSUSE-SU-2021:1271-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.241-184.433 | 1.0-0.amzn2 | ALAS2-2021-1696 |
| Amazon Linux 2 | perf +8 | 4.14.241-184.433.amzn2 | ALAS2-2021-1696 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.10.78.1-1 | — |
Advisories 30
- USN-5137-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5137-2 linux-bluefield, linux-gke-5.4, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5115-1 linux-oem-5.10 vulnerabilities Ubuntu Security Notices (USN) · Sep 14, 2026
- USN-5096-1 linux-oem-5.13 vulnerabilities Ubuntu Security Notices (USN) · Sep 9, 2026
- USN-5092-1 linux, linux-aws, linux-aws-5.11, linux-gcp, linux-kvm, linux-oracle, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-5092-2 linux-hwe-5.11, linux-azure, linux-azure-5.11, linux-oracle-5.11 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2785-1 linux-4.19 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:3929-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · 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
- 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-2021:3935-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1477-1 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-2025:0229-1 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-2021:3748-1 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-2021:1271-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3723-1 Security update for the Linux Kernel 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
- ALAS2-2021-1696 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 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
References
- https://www.openwall.com/lists/oss-security/2021/08/01/3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=f5e81d1117501546b7be050c5fbafa6efd2c722c
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=2039f26f3aca5b0e419b98f65dd36481337b86ee
- FEDORA-2021-4d4d3866ca vendor-advisory
- FEDORA-2021-54ee631709 vendor-advisory
- [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update mailing-list