📄 Description (English)
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.
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🔗 References & Sources 8
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https://access.redhat.com/security/cve/CVE-2026-4878
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2447554
secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2451615
secalert@redhat.com
http://www.openwall.com/lists/oss-security/2026/04/07/14
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/04/07/4
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/04/08/9
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/04/09/5
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/04/09/6
af854a3a-2127-422b-91ae-364da2661108