CVE-2026-43106

A flaw was found in the Linux kernel's cachefiles module, which manages cached files. This vulnerability stems from an error in how the system counts references to certain file system objects, specifically within the cachefiles_cull() function. When a reference is lost, it can lead to system instability. This could potentially result in a denial of service (DoS), making the system unavailable to users.

Red Hat acknowledges the upstream Linux kernel correction for «cachefiles» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.

To mitigate this issue, prevent the cachefiles module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.