🛡️ CVE-2026-4878
🟡 CVSS 6.7 — Medium ⚠️ Exploit Public CWE-367 NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE CWE-367
Public Exploit ⚠️ Yes
Source NVD
Published 2026-04-09
Updated 2026-06-12
Modified 2026-06-11
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-linux — —
libcap — —
openshift-container-platform — —

References

Issue Tracking, Vendor Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2451615
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2026/04/07/4
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2026/04/08/9
Exploit, Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2026/04/09/5
Exploit, Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2026/04/09/6

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