CVE-2026-31431
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- In the wild
- CISA lists this as exploited in real attacks. Treat as urgent.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- 2026-05-01 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- 2026-05-15 Remediation deadlineCISA's due date for federal agencies to fix it
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
- Exploit odds: 98.1% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Added to CISA KEV
- 2026-05-01
- Exploit probability
- 98.1% · EPSS, next 30 days
- Weakness
- CWE-669
- Record status
- Analyzed
Affected
- Linux Kernel < 5.10.254
- Linux Kernel < 5.15.204
- Linux Kernel < 6.1.170
- Linux Kernel < 6.6.137
- Linux Kernel < 6.12.85
- Linux Kernel < 6.18.22
- Linux Kernel < 6.19.12
- Linux Kernel 7.0
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-31431.md and follow it. Check whether this project is affected by CVE-2026-31431. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- 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
References
- 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
- http://www.openwall.com/lists/oss-security/2026/04/30/6
- http://www.openwall.com/lists/oss-security/2026/05/01/10
- http://www.openwall.com/lists/oss-security/2026/05/01/12