NULL Pointer Dereference Affecting torvalds/linux package, versions [3.8,6.1.191)[6.2,6.4.5)
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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- published9 Oct 2026
- disclosed18 Sept 2025
- creditUnknown
Introduced: 18 Sep 2025
CVE-2023-53447 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.1.191, 6.4.5 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference due to a race condition between the remount and fallocate processes in the filesystem, specifically when the READ_EXTENT_CACHE mount option is reset and updated. An attacker can trigger a NULL pointer dereference by exploiting this race condition during concurrent remount and file allocation operations.
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