Use After Free Affecting torvalds/linux package, versions [5.15.121,5.15.200)[6.1.36,6.1.163)[4.19.316,4.20)[5.4.262,5.5)[5.10.188,5.11)[6.3.10,6.4)[6.4,6.6.124)[6.7,6.12.70)[6.13,6.18.10)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit 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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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20786024
- published10 Oct 2026
- disclosed13 Feb 2026
- creditUnknown
Introduced: 13 Feb 2026
CVE-2026-23111 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.15.200, 6.1.163, 4.20, 5.5, 5.11, 6.4, 6.6.124, 6.12.70, 6.18.10 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the nft_map_catchall_activate process. An attacker can achieve local privilege escalation by repeatedly triggering abort cycles in nftables with catchall map elements and NFT_GOTO verdicts, causing a reference count to reach zero and freeing a chain object while it is still referenced. This allows the attacker to reclaim the freed memory and execute arbitrary code in kernel context.
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