CVE-2026-4878

Published Apr 9, 2026

Last updated 9 hours ago

CVSS medium 6.7

Overview

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.
Source
secalert@redhat.com
NVD status
Analyzed
Products
libcap, openshift_container_platform, enterprise_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
7
Impact score
5.9
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secalert@redhat.com
CWE-367

Social media

Hype score
Not currently trending

Configurations

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References

Sources include official advisories and independent security research.