NULL Pointer Dereference Affecting torvalds/linux package, versions [4.9,6.1.191)[6.2,6.6.136)[6.7,6.12.83)[6.13,6.18.24)[6.19,6.19.14)
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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- published10 Oct 2026
- disclosed6 May 2026
- creditUnknown
Introduced: 6 May 2026
CVE-2026-43091 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.1.191, 6.6.136, 6.12.83, 6.18.24, 6.19.14 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the xfrm_policy_fini process. An attacker can cause kernel memory corruption or trigger a system crash by racing the teardown of a network namespace with concurrent XFRM policy lookups, leading to use-after-free conditions in the policy hash table.
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