Description
In the Linux kernel through 4.20.11, af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr.
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 | 4.19.28-1 | — |
| Debian 13 | linux | 4.19.28-1 | — |
| Debian 12 | linux | 4.19.28-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux | 4.15.0-47.50 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1035.37 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1014.14~18.04.1 | USN-3930-2 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1029.31 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-gcp-edge | 4.18.0-1008.9~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-17.18~18.04.1 | USN-3930-2 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1031.31 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1035.40 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1010.12 | USN-3931-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1033.35 | USN-3931-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1035.37~16.04.1 | USN-3931-2 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1041.45 | USN-3931-2 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1029.31~16.04.1 | USN-3931-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-47.50~16.04.1 | USN-3931-2 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1010.12~16.04.1 | USN-3931-2 |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1041.45~14.04.1 | USN-3931-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +13 | 4.14.0-115.17.1.el7a | RHSA-2020:0174 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | kernel-azure +2 | 4.12.14-5.24.1 | SUSE-SU-2019:0785-1 |
| SLES 15 | kernel-default +3 | 4.12.14-150.14.2 | SUSE-SU-2019:0784-1 |
| SLES 15 | kernel-docs +2 | 4.12.14-150.14.1 | SUSE-SU-2019:0784-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.9.1 | SUSE-SU-2019:0767-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.13.1 | SUSE-SU-2019:0765-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.9.1 | SUSE-SU-2019:0767-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.13.1 | SUSE-SU-2019:0765-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.14.2 | SUSE-SU-2019:0784-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_0 | 9-25.2 | SUSE-SU-2019:0740-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_1 +1 | 8-2.1 | SUSE-SU-2019:0745-1, SUSE-SU-2019:0740-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_3 | 6-2.1 | SUSE-SU-2019:0745-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_4 +1 | 5-2.1 | SUSE-SU-2019:0745-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_6 | 4-2.1 | SUSE-SU-2019:0745-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_7 | 3-2.1 | SUSE-SU-2019:0845-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_8 | 2-2.1 | SUSE-SU-2019:0845-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_9 | 1-1.9.3 | SUSE-SU-2019:0784-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_0 | 4-2.10.2 | SUSE-SU-2019:0726-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_1 | 3-2.1 | SUSE-SU-2019:0726-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_2 | 2-2.1 | SUSE-SU-2019:0726-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_3 | 1-6.7.1 | SUSE-SU-2019:0765-1 |
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 15.0 | kernel-docs +8 | 4.12.14-lp150.12.58.1 | openSUSE-SU-2019:1193-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | perf +8 | 4.14.104-95.84.amzn2 | ALAS2-2019-1167 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +10 | 4.14.35-1844.4.5.el7uek | ELSA-2019-4612 |
Advisories 17
- USN-3931-1 linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-3931-2 linux-hwe, linux-aws-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-3930-2 linux-hwe, linux-azure vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2020:0174 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- SUSE-SU-2019:0784-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0745-1 Security update for the Linux Kernel (Live Patch 2 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0765-1 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
- openSUSE-SU-2019:1193-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0845-1 Security update for the Linux Kernel (Live Patch 8 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0740-1 Security update for the Linux Kernel (Live Patch 1 for SLE 15) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0785-1 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
- SUSE-SU-2019:0726-1 Security update for the Linux Kernel (Live Patch 2 for SLE 12 SP4) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0767-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-4612 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 12, 2019
- ALAS2-2019-1167 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 8, 2019
References
- 107063 vdb-entry
- http://patchwork.ozlabs.org/patch/1042902/
- USN-3930-1 vendor-advisory
- USN-3931-1 vendor-advisory
- USN-3931-2 vendor-advisory
- USN-3930-2 vendor-advisory
- openSUSE-SU-2019:1193 vendor-advisory
- RHSA-2020:0174 vendor-advisory