Improper Input Validation Affecting torvalds/linux package, versions [5.7,6.12.114)[6.13,6.17.6)
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-20700857
- published10 Oct 2026
- disclosed16 Dec 2025
- creditUnknown
Introduced: 16 Dec 2025
CVE-2025-40355 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.12.114, 6.17.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Input Validation in the __dev_change_net_namespace process. An attacker can trigger a kernel warning and potentially cause system instability by attempting to change the ownership of a sysfs group attribute that is not visible.
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