--- cve: "CVE-2026-4878" severity: "MEDIUM" cvss: 6.7 epss: "21%" vendor: "Red Hat" kev: false exploited: false published: "2026-04-09 16:16:31" tags: [cve, security, medium] source: tsecurity.de CVE-Dossier exported: "2026-09-14T01:46:58+02:00" --- # CVE-2026-4878 > 6.7 MEDIUM ## Beschreibung 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. ## CVSS-Vektor ``` CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H ``` | Metrik | Wert | Bewertung | |---|---|---| | AV Angriffsvektor | Lokal | good | | AC Komplexität | Hoch | good | | PR Privilegien | Gering | warn | | UI Interaktion | Erforderlich | good | | S Scope | Unverändert | good | | C Vertraulichkeit | Hoch | bad | | I Integrität | Hoch | bad | | A Verfügbarkeit | Hoch | bad | ## Referenzen - - - - - - - - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-4878) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_