Description
A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm's module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Kernel | All kernel versions before 5.0 | — |
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 | 4.19.20-1 | — |
| Debian 13 | linux | 4.19.20-1 | — |
| Debian 12 | linux | 4.19.20-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-55.60 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1047.49 | — |
| Ubuntu 18.04 LTS | linux-gcp +5 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1037.39 | — |
| Ubuntu 18.04 LTS | linux-hwe | 5.0.0-23.24~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1039.39 | — |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1050.57 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1018.20 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1041.44 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1058.64 | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-145.171 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1079.89 | — |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1047.49~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1051.56 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1037.39~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-55.60~16.04.2 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1043.49 | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1018.20~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1106.114 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1110.115 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1040.43 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-144.170~14.04.1 | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1114.123~20.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1059.64~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-alt +1 | 4.14.0-115.29.1.el7a | RHSA-2020:3545 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.11.1.rt56.1145.el7 | RHSA-2020:5441 |
| RHEL 7 | perf +18 | 3.10.0-1160.11.1.el7 | RHSA-2020:5437, RHSA-2020:3545 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.38.1 | SUSE-SU-2020:2103-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.22.1 | SUSE-SU-2020:2119-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLES 12 SP3 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SLES 12 SP3 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.175.2 | SUSE-SU-2022:2077-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.117.1 | SUSE-SU-2020:14442-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.22.1 | SUSE-SU-2020:2119-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLES for SAP 12 SP3 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SLES for SAP 12 SP3 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.13.1 | SUSE-SU-2020:2478-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.23.1 | SUSE-SU-2020:2156-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_13 | 1-3.3.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_19 | 1-1.3.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_7 | 1-8.3.1 | SUSE-SU-2020:2122-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_15 | 1-6.3.1 | SUSE-SU-2020:2121-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.28.1 | SUSE-SU-2020:2487-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kernel-default | 4.4.180-94.164.3 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +1 | 4.4.180-94.164.2 | SUSE-SU-2022:2082-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_45 | 1-4.3.2 | SUSE-SU-2022:2082-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.59.1 | openSUSE-SU-2020:1153-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.52.1.el6uek | 0.4.5-3.el6 | ELSA-2020-5968 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.52.1.el7uek | 0.4.5-3.el7 | ELSA-2020-5968 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.52.1.el7uek | ELSA-2020-5968, ELSA-2020-5866, ELSA-2020-5845 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1902.306.2.el7uek | ELSA-2020-5845 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.11.1.el7 | ELSA-2020-5845, ELSA-2020-5437 |
Advisories 20
- RHSA-2020:5441 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5437 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:3545 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- openSUSE-SU-2020:1153-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2077-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2082-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2156-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2119-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2487-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2107-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2121-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14442-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2122-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2478-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2103-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2106-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-5437 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 16, 2020
- ELSA-2020-5968 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 7, 2020
- ELSA-2020-5866 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2020-5845 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020