Use After Free Affecting torvalds/linux package, versions [4.13,6.1.191)[6.2,6.6.160)[6.7,6.12.64)[6.13,6.17.3)
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-20700746
- published10 Oct 2026
- disclosed12 Nov 2025
- creditUnknown
Introduced: 12 Nov 2025
CVE-2025-40170 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.1.191, 6.6.160, 6.12.64, 6.17.3 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the sk_setup_caps process. An attacker can cause memory disclosure, data corruption, and system crashes by racing socket syscalls with network device or route deletion operations from separate threads. This can lead to freed memory being read and written into persistent socket state, potentially leaking sensitive information and corrupting network transmission paths.
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