CVE-2026-31431
Description
Important: kernel-rt security update
CISA KEV
- Vendor
- Linux
- Product
- Kernel
- Due date
- 2026-05-15
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-13578.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:13578
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-13577.html
Vendor advisory: alma — https://bugzilla.redhat.com/2453803
Vendor advisory: alma — https://bugzilla.redhat.com/2424886
Vendor advisory: alma — https://bugzilla.redhat.com/2301637
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:13577
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-13565.html
Vendor advisory: alma — https://bugzilla.redhat.com/2454844
Vendor advisory: alma — https://bugzilla.redhat.com/2448745
Vendor advisory: alma — https://bugzilla.redhat.com/2439852
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-19225.html
Vendor advisory: alma — https://bugzilla.redhat.com/2467771
Vendor advisory: alma — https://bugzilla.redhat.com/2461763
Vendor advisory: alma — https://bugzilla.redhat.com/2460538
Vendor advisory: alma — https://bugzilla.redhat.com/2436779
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-A002.html
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-A001.html
Vendor advisory: alma — https://bugzilla.redhat.com/show_bug.cgi?id=2460538
Vendor advisory: cisa-kev — https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/; https://xint.io/blog/copy-fail-linux-distributions#the-fix-6 ; https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/ ; https://nvd.nist.gov/vuln/detail/CVE-2026-31431
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-31431
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-31431.html
Vendor advisory: 134c704f-9b21-4f2e-91b3-4a467353bcc0 — https://xint.io/blog/copy-fail-linux-distributions#the-fix-6
Vendor advisory: 134c704f-9b21-4f2e-91b3-4a467353bcc0 — https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/5
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/16
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/15
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/14
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/12
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/11
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/30/10
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/29/26
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/29/25
Vendor advisory: af854a3a-2127-422b-91ae-364da2661108 — http://www.openwall.com/lists/oss-security/2026/04/29/23
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:19225
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:15978
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:13565
Exploits
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| arch | fixed | 6.19.12-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | bullseye | fixed | 5.10.251-3 |
| debian | forky | fixed | 6.19.12-1 |
| debian | sid | fixed | 6.19.12-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 5.10.254 | |
| linux-kernel | 7.0 | affected | |
| rhel | 8.0 | affected | |
| rhel | 9.0 | affected | |
| rhel | 10.0 | affected | |
| rhel | 10.1 | affected | |
| debian | 11.0 | affected | |
| debian | 12.0 | affected | |
| debian | 13.0 | affected | |
| ubuntu | - | affected | |
| ubuntu | 14.04 | affected | |
| ubuntu | 16.04 | affected | |
| ubuntu | 18.04 | affected | |
| ubuntu | 20.04 | affected | |
| ubuntu | 22.04 | affected | |
| ubuntu | 24.04 | affected | |
| ubuntu | 25.10 | affected | |
| suse | 15.3 | affected | |
| suse | 15.4 | affected | |
| suse | 15.5 | affected | |
| suse | 15.6 | affected | |
| suse | 11 | affected | |
| suse | 12 | affected | |
| suse | 15 | affected | |
| suse | 16.0 | affected | |
| suse | 16.1 | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| redhat | openshift_container_platform | 4.0 | |
| suse | caas_platform | 4.0 | |
| suse | enterprise_storage | 6.0 | |
| suse | enterprise_storage | 7.0 | |
| suse | enterprise_storage | 7.1 | |
| suse | manager_proxy | 4.0 | |
| suse | manager_proxy | 4.1 | |
| suse | manager_proxy | 4.2 | |
| suse | manager_proxy | 4.3 | |
| suse | manager_retail_branch_server | 4.0 | |
| suse | manager_retail_branch_server | 4.1 | |
| suse | manager_retail_branch_server | 4.2 | |
| suse | manager_retail_branch_server | 4.3 | |
| suse | manager_server | 4.0 | |
| suse | manager_server | 4.1 | |
| suse | manager_server | 4.2 | |
| suse | manager_server | 4.3 | |
| suse | openstack_cloud | 9.0 | |
| suse | openstack_cloud_crowbar | 9.0 | |
| arista | cloudvision_agni | {"startIncluding":"2024.4.0","endIncluding":"2025.2.2"} | |
| arista | cloudvision_portal | {"startIncluding":"2024.2.0","endIncluding":"2026.1.0"} | |
| arista | velocloud_edge | {"startIncluding":"4.5.0","endIncluding":"6.4.1"} | |
| arista | velocloud_gateway | - | |
| vmware | velocloud_orchestrator | - | |
References
- https://access.redhat.com/errata/RHSA-2026:13565
- https://access.redhat.com/errata/RHSA-2026:15978
- https://access.redhat.com/errata/RHSA-2026:19225
- https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c
- https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc
- https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667
- https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82
- https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b
- https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5
- https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237
- https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
- http://www.openwall.com/lists/oss-security/2026/04/29/23
- http://www.openwall.com/lists/oss-security/2026/04/29/25
- http://www.openwall.com/lists/oss-security/2026/04/29/26
- http://www.openwall.com/lists/oss-security/2026/04/30/10
- http://www.openwall.com/lists/oss-security/2026/04/30/11
- http://www.openwall.com/lists/oss-security/2026/04/30/12
- http://www.openwall.com/lists/oss-security/2026/04/30/14
- http://www.openwall.com/lists/oss-security/2026/04/30/15
- http://www.openwall.com/lists/oss-security/2026/04/30/16
- http://www.openwall.com/lists/oss-security/2026/04/30/17
- http://www.openwall.com/lists/oss-security/2026/04/30/18
- http://www.openwall.com/lists/oss-security/2026/04/30/2
- http://www.openwall.com/lists/oss-security/2026/04/30/20
- http://www.openwall.com/lists/oss-security/2026/04/30/5
CWEs
CWE-669
Verify integrity in audit chain (admin only). AS-IS.