CVE-2026-4878

A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.

The following products are affected by CVE-2026-4878 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4878.

URL	Resource
http://www.openwall.com/lists/oss-security/2026/04/07/14
http://www.openwall.com/lists/oss-security/2026/04/07/4
http://www.openwall.com/lists/oss-security/2026/04/08/9
http://www.openwall.com/lists/oss-security/2026/04/09/5
http://www.openwall.com/lists/oss-security/2026/04/09/6
https://access.redhat.com/security/cve/CVE-2026-4878
https://bugzilla.redhat.com/show_bug.cgi?id=2447554
https://bugzilla.redhat.com/show_bug.cgi?id=2451615