CVE-2026-4878
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
6.7 / 10
Vector String
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Vulnerability Description
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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-367
Source
NVD
External References
- 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
- 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
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