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CVE-2026-4878 on Cyberus Linux 26.05

Aliases: CVE-2026-4878

Packages: libcap

Status: Plausible

Advisory Information

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.

Updates

2026-09-17 00:05 CEST

Metadata changes:

  • Status for package libcap: “Plausible”

2026-09-16 18:16 CEST

Metadata changes:

  • Status for package libcap: “New”

(Amended on: 2026-09-17 00:05 CEST)