Use After Free Affecting torvalds/linux package, versions [5.10.253,5.10.261)[5.15.203,5.15.212)[6.1.169,6.1.177)[6.6.130,6.6.144)[6.12.77,6.12.95)[6.18.18,6.18.38)[6.19.8,6.20)[7.0,7.1.3)
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-20790529
- published11 Oct 2026
- disclosed19 Jul 2026
- creditUnknown
Introduced: 19 Jul 2026
CVE-2026-63827 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.10.261, 5.15.212, 6.1.177, 6.6.144, 6.12.95, 6.18.38, 6.20, 7.1.3 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the aa_replace_profiles process. An attacker can cause kernel memory corruption and potentially escalate local privileges by triggering a race condition during concurrent policy load, replace, and removal operations, leading to use of freed memory in the AppArmor rawdata deduplication logic. This is only exploitable if the attacker has CAP_MAC_ADMIN and policy-view rights, which can be obtained by namespace-root in an unprivileged user namespace on typical AppArmor deployments.
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