Description
An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d.
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 | 5.8.10-1 | — |
| Debian 13 | linux | 5.8.10-1 | — |
| Debian 12 | linux | 5.8.10-1 | — |
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 | 5.4.0-56.62 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1030.31 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1032.33 | — |
| Ubuntu 20.04 LTS | linux-gcp +1 | 5.4.0-1030.32 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1028.29 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1023.26 | — |
| Ubuntu 20.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-126.129 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1088.93 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1030.31~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1100.111 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1032.33~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1007.11 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1088.101 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 +2 | 5.4.0-1030.32~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1005.6 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-56.62~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1079.81 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1059.65 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1023.26~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1074.79 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1091.100 | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-197.229 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1118.132 | — |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1088.93~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1100.111~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1088.101~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-126.129~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1084.93 | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1059.65~16.04.1 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | 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-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2031.32 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2013.15 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1046.53 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1051.57 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1082.86 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1100.111~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-197.229~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-348.rt7.130.el8 | RHSA-2021:4140 |
| RHEL 8 | perf +26 | 4.18.0-348.el8 | RHSA-2021:4356 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-348.el8 | ALSA-2021:4356 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | kernel-64kb +5 | 5.3.18-59.5.2 | SUSE-SU-2021:1977-1 |
| SLES 15 SP3 | kernel-azure +2 | 5.3.18-38.3.1 | SUSE-SU-2021:1975-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-59.5.2.18.2.2 | SUSE-SU-2021:1977-1 |
| SLES 15 SP3 | kernel-syms +1 | 5.3.18-59.5.1 | SUSE-SU-2021:1977-1 |
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.44.1 | SUSE-SU-2021:1301-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.61.1.9.26.4 | SUSE-SU-2021:1238-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.61.1 | SUSE-SU-2021:1238-1 |
| SLES 15 SP1 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SLES 15 SP1 | kernel-syms +4 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SLES 15 | kernel-docs | 4.12.14-150.72.2 | SUSE-SU-2021:1573-1 |
| SLES 15 | kernel-syms +5 | 4.12.14-150.72.1 | SUSE-SU-2021:1573-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.56.1 | SUSE-SU-2024:1643-1, SUSE-SU-2021:1572-1 |
| SLES 12 SP5 | kernel-docs +3 | 4.12.14-122.71.1 | SUSE-SU-2024:1870-1, SUSE-SU-2021:1595-1 |
| SLES 12 SP5 | kernel-obs-build | 4.12.14-122.71.2 | SUSE-SU-2024:1870-1, SUSE-SU-2021:1595-1 |
Show 28 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.74.1 | SUSE-SU-2021:1596-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.144.1 | SUSE-SU-2021:1623-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_39 | 1-4.3.1 | SUSE-SU-2021:1623-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.155.1 | SUSE-SU-2021:1617-1 |
| SLES for SAP 15 SP1 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SLES for SAP 15 SP1 | kernel-syms +3 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SLES for SAP 15 | kernel-docs | 4.12.14-150.72.2 | SUSE-SU-2021:1573-1 |
| SLES for SAP 15 | kernel-syms +4 | 4.12.14-150.72.1 | SUSE-SU-2021:1573-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.56.1 | SUSE-SU-2024:1643-1, SUSE-SU-2021:1572-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.71.1 | SUSE-SU-2024:1870-1, SUSE-SU-2021:1595-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.74.1 | SUSE-SU-2021:1596-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.144.1 | SUSE-SU-2021:1623-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_39 | 1-4.3.1 | SUSE-SU-2021:1623-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.43.1 | SUSE-SU-2021:1605-1 |
| SLE Micro 5.0 | kernel-default | 5.3.18-24.61.1 | SUSE-SU-2021:1238-1 |
| SLE Micro 5.0 | kernel-default-base | 5.3.18-24.61.1.9.26.4 | SUSE-SU-2021:1238-1 |
| SLE Micro 5.0 | kernel-rt | 5.3.18-8.7.1 | SUSE-SU-2021:1625-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-59.5.2 | SUSE-SU-2021:1977-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_1 | 1-7.5.1 | SUSE-SU-2021:1977-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.61.1 | SUSE-SU-2021:1238-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_12 | 1-5.3.4 | SUSE-SU-2021:1238-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_24 | 1-3.3.2 | SUSE-SU-2021:1624-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.72.1 | SUSE-SU-2021:1573-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_24 | 1-1.3.1 | SUSE-SU-2021:1573-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.71.1 | SUSE-SU-2024:1870-1, SUSE-SU-2021:1595-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_18 | 1-8.5.1 | SUSE-SU-2021:1595-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_56 | 1-8.3.1 | SUSE-SU-2024:1870-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.74.1 | SUSE-SU-2021:1596-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_20 | 1-6.3.1 | SUSE-SU-2021:1596-1 |
| SLE HPC 15 SP1 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SLE HPC 15 SP1 | kernel-syms +3 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SLE HPC 15 | kernel-docs | 4.12.14-150.72.2 | SUSE-SU-2021:1573-1 |
| SLE HPC 15 | kernel-syms +4 | 4.12.14-150.72.1 | SUSE-SU-2021:1573-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-33.1 | SUSE-SU-2021:1211-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.74.1 | SUSE-SU-2021:1596-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.144.1 | SUSE-SU-2021:1623-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_39 | 1-4.3.1 | SUSE-SU-2021:1623-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.74.1 | SUSE-SU-2021:1596-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.144.1 | SUSE-SU-2021:1623-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_39 | 1-4.3.1 | SUSE-SU-2021:1623-1 |
| SUSE Manager Server 4.0 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SUSE Manager Server 4.0 | kernel-syms +4 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SUSE Manager Retail Branch Server 4.0 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SUSE Manager Retail Branch Server 4.0 | kernel-syms +3 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SUSE Manager Proxy 4.0 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SUSE Manager Proxy 4.0 | kernel-syms +3 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.144.1 | SUSE-SU-2021:1623-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_39 | 1-4.3.1 | SUSE-SU-2021:1623-1 |
| SUSE Enterprise Storage 6 | kernel-docs | 4.12.14-197.89.3 | SUSE-SU-2021:1624-1 |
| SUSE Enterprise Storage 6 | kernel-syms +3 | 4.12.14-197.89.2 | SUSE-SU-2021:1624-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | kernel-64kb +7 | 5.3.18-59.5.2 | openSUSE-SU-2021:1977-1 |
| openSUSE Leap 15.3 | kernel-azure +2 | 5.3.18-38.3.1 | openSUSE-SU-2021:1975-1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.5.2.18.2.2 | openSUSE-SU-2021:1977-1 |
| openSUSE Leap 15.3 | kernel-syms +2 | 5.3.18-59.5.1 | openSUSE-SU-2021:1977-1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.72.1.lp152.8.30.1 | openSUSE-SU-2021:0579-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.72.1 | openSUSE-SU-2021:0579-1 |
| openSUSE Leap 15.2 | kernel-rt +3 | 5.3.18-lp152.3.8.1 | openSUSE-SU-2021:0758-1 |
Advisories 24
- ALSA-2021:4356 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:4356 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2021:4140 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 14, 2026
- SUSE-SU-2021:1623-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1238-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1573-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1211-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1870-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1975-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1301-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1625-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1572-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1605-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1596-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1617-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0579-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0758-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1643-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1624-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1977-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1595-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1975-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2021:1977-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-2072 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 2, 2024