CVE-2026-31431
Vulnerability Summary
Timeline
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.
CVSS Metrics
- v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Trends
Current EPSS score: 2.60%• Percentile: 86%
Techniques & Countermeasures
- CWE-669•Incorrect Resource Transfer Between Spheres
The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.
Affected Systems
- linux•linux
≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < 893d22e0135fa394db81df88697fba6032747667 | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < 19d43105a97be0810edbda875f2cd03f30dc130c | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < 961cfa271a918ad4ae452420e7c303149002875b | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < 3115af9644c342b356f3f07a4dd1c8905cd9a6fc | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < 8b88d99341f139e23bdeb1027a2a3ae10d341d82 | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < ce42ee423e58dffa5ec03524054c9d8bfd4f6237 | ≥ 72548b093ee38a6d4f2a19e6ef1948ae05c181f7, < a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 | 4.14
- linux•linux_kernel
≥ 4.14, < 5.10.254 | ≥ 5.11, < 5.15.204 | ≥ 5.16, < 6.1.170 | ≥ 6.2, < 6.6.137 | ≥ 6.7, < 6.12.85 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
References (41)
- https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
- https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237
- https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5
- https://github.com/theori-io/copy-fail-CVE-2026-31431
- http://www.openwall.com/lists/oss-security/2026/04/29/23
- https://copy.fail
- 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/2026/04/30/2
- http://www.openwall.com/lists/oss-security/2026/04/30/5
- http://www.openwall.com/lists/oss-security/2026/04/30/6
- https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667
- https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c
- https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b
- https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc
- https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82
- 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
- https://websec.net/blog/cve-2026-31431-linux-algifaead-page-cache-write-to-root-69f38a4ccddd2db1f520f170
- http://www.openwall.com/lists/oss-security/2026/04/30/20
- http://www.openwall.com/lists/oss-security/2026/05/01/2
- http://www.openwall.com/lists/oss-security/2026/05/01/3
- https://xint.io/blog/copy-fail-linux-distributions#the-fix-6
- https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/
- https://access.redhat.com/security/cve/cve-2026-31431#cve-details-mitigation
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-31431
- http://www.openwall.com/lists/oss-security/2026/05/01/10
- http://www.openwall.com/lists/oss-security/2026/05/01/12
- http://www.openwall.com/lists/oss-security/2026/05/01/15
- http://www.openwall.com/lists/oss-security/2026/05/01/16
- http://www.openwall.com/lists/oss-security/2026/05/01/17
- http://www.openwall.com/lists/oss-security/2026/05/01/18
- http://www.openwall.com/lists/oss-security/2026/05/01/22
- http://www.openwall.com/lists/oss-security/2026/05/01/23
- http://www.openwall.com/lists/oss-security/2026/05/01/24