Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') Affecting torvalds/linux package, versions [5.15,6.6.160)[6.7,6.12.13)[6.13,6.13.2)
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-20698734
- published10 Oct 2026
- disclosed6 Mar 2025
- creditUnknown
Introduced: 6 Mar 2025
CVE-2025-21825 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.6.160, 6.12.13, 6.13.2 or higher.
Overview
Affected versions of this package are vulnerable to Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in the htab_map_update_elem process. An attacker can achieve arbitrary kernel memory disclosure, heap corruption, and potential control-flow hijack by exploiting a race condition during concurrent updates and timer cancellations, leading to use-after-free and double-free scenarios. This is only exploitable if the PREEMPT_RT configuration is enabled.
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