Use After Free Affecting torvalds/linux package, versions [4.13,4.14.237)[4.15,4.19.195)[4.20,5.4.126)[5.5,5.10.44)[5.11,5.12.11)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20571728
- published8 Oct 2026
- disclosed21 May 2024
- creditUnknown
Introduced: 21 May 2024
CVE-2021-47259 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 4.14.237, 4.19.195, 5.4.126, 5.10.44, 5.12.11 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the nfs4_init_client process. An attacker can achieve arbitrary kernel memory disclosure, arbitrary write, control-flow hijacking, or cause a kernel panic by mounting two different exports through two different NICs belonging to the same server, or by driving NFSv4 referral or migration to a trunking-matched address. This is only exploitable if the attacker can trigger NFSv4 referral/submount automounts or migration on an already-mounted export.
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