Arbitrary Code Execution Affecting torvalds/linux package, versions [4.14-rc1,5.10.253)[5.11-rc1,5.15.203)[5.16-rc1,6.1.169)[6.2-rc1,6.6.136)[6.7-rc1,6.12.84)[6.13-rc1,6.18.22)[6.19-rc1,6.19.12)[7.0-rc1,7.0-rc7)
Threat Intelligence
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-16353433
- published3 May 2026
- disclosed28 Apr 2026
- creditXint Code Research Team
Introduced: 28 Apr 2026
NewCVE-2026-31431 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.10.253, 5.15.203, 6.1.169, 6.6.136, 6.12.84, 6.18.22, 6.19.12, 7.0-rc7 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Execution in crypto/algif_aead.c. The authencesn cryptographic template has a 4-byte overwrite past the end of its buffer, which can be controlled to write into the page cache of any readable file. This allows a low-privileged local user to elevate privileges to root by corrupting the cache of a setuid binary.
The AF_ALG API opens a socket that is accessible from userspace. When functions such as splice() interact with these sockets they can access the cache pages of arbitrary files by reference. The kernel's AEAD algorithm implementation in authencesn can write past its intended output boundary by design, to use neighboring memory regions as scratch space.