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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-4878 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/04/07/14 CVE
http://www.openwall.com/lists/oss-security/2026/04/07/4 CVE
http://www.openwall.com/lists/oss-security/2026/04/08/9 CVE
http://www.openwall.com/lists/oss-security/2026/04/09/5 CVE
http://www.openwall.com/lists/oss-security/2026/04/09/6 CVE
https://access.redhat.com/security/cve/CVE-2026-4878 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2447554 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2451615 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition Red Hat, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4878
NVD Published Date:
04/09/2026
NVD Last Modified:
04/09/2026
Source:
Red Hat, Inc.