Time-of-check Time-of-use (TOCTOU) Race Condition Affecting libcap package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Time-of-check Time-of-use (TOCTOU) Race Condition vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CONAN-LIBCAP-16122107
- published22 Apr 2026
- disclosed6 Apr 2026
- creditAli Raza
Introduced: 6 Apr 2026
NewCVE-2026-4878 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition via the cap_set_file() function. An attacker can gain elevated privileges by exploiting a race condition during file capability updates, redirecting capabilities to an attacker-controlled file when privileged processes invoke cap_set_file on attacker-influenced paths.