CVE-2026-80878

A flaw was found in the Linux kernel's AFS (Andrew File System) implementation. This issue occurs when afs_lookup_volume_rcu() fails to acquire a volume, leading to a resource leak. A local attacker could potentially exploit this flaw to cause a denial of service due to resource exhaustion.

A flaw rated with an IMPORTANT impact was found in the Linux kernel's Andrew File System (AFS) implementation used in Red Hat products. When afs_lookup_volume_rcu() fails to obtain a reference on a volume because afs_try_get_volume() fails, the dying volume object is leaked instead of being released. A local attacker able to trigger AFS volume lookups on an affected system could exploit this resource leak to exhaust kernel resources and cause a denial of service. Red Hat assigns this flaw a CVSS 3.1 base score of 7.0 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). The kernel and kernel-rt components in Red Hat Enterprise Linux 9 (9.6.z, 9.8.z, 9.9, and 9.10 streams), Red Hat Enterprise Linux 10 (10.0.z, 10.2.z, 10.3, and 10.4 streams), and Red Hat In-Vehicle OS 2 are affected, and fixes are being pursued by the responsible engineering teams. Earlier Red Hat Enterprise Linux streams (RHEL 6, 7, 8, and the RHEL 9.2/9.4 streams) are not affected because the vulnerable code is not present in those kernels.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.