Out-of-Bounds Affecting torvalds/linux package, versions [4.17,5.10.253)[5.11,5.15.203)[5.16,6.1.169)[6.2,6.6.130)[6.7,6.12.77)[6.13,6.18.18)[6.19,6.19.8)
Threat Intelligence
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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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20788113
- published10 Oct 2026
- disclosed1 Apr 2026
- creditUnknown
Introduced: 1 Apr 2026
CVE-2026-23406 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.10.253, 5.15.203, 6.1.169, 6.6.130, 6.12.77, 6.18.18, 6.19.8 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-Bounds in the match_char macro when traversing differential encoding chains in AppArmor's DFA matching process. An attacker can cause unauthorized access to files or crash the kernel by performing file operations that trigger the flawed evaluation, leading to out-of-bounds reads in kernel memory.
Note: The Linux kernel project assigns a CVE to every bug fix it ships, whether or not the bug has been shown to be exploitable. This advisory was generated from that process and has not been individually assessed for exploitability. See the kernel's CVE process documentation: https://github.com/torvalds/linux/blob/master/Documentation/process/cve.rst