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CVE-2026-4878 Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()

🗓️ 09 Apr 2026 14:49:02Reported by redhatType 
cvelist
 cvelist🔗 www.cve.org👁 36 Views

Unprivileged user exploits TOCTOU race in cap_set_file to redirect capabilities, enabling escalation.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-4878
9 Apr 202614:49
–attackerkb
Tenable Nessus		Alibaba Cloud Linux 3 : 0126: libcap (ALINUX3-SA-2026:0126)
25 May 202600:00
–nessus
Tenable Nessus		AlmaLinux 10 : libcap (ALSA-2026:12423)
2 May 202600:00
–nessus
Tenable Nessus		AlmaLinux 9 : libcap (ALSA-2026:12441)
2 May 202600:00
–nessus
Tenable Nessus		AlmaLinux 8 : libcap (ALSA-2026:13285)
4 May 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP11 : libcap (EulerOS-SA-2026-2211)
9 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP11 : libcap (EulerOS-SA-2026-2249)
9 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP13 : libcap (EulerOS-SA-2026-2295)
10 Jun 202600:00
–nessus
Tenable Nessus		EulerOS 2.0 SP13 : libcap (EulerOS-SA-2026-2338)
10 Jun 202600:00
–nessus
Tenable Nessus		MiracleLinux 9 : libcap-2.48-10.el9_7.1 (AXSA:2026-540:01)
4 May 202600:00
–nessus
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11 Jun 2026 09:32Current
CVSS 3.16.7
EPSS0.00013
CWE-367
time of checktime of usecap_set_filelibcapprivilege escalationcapabilities
36