--- cve: "CVE-2026-52914" severity: "CRITICAL" cvss: 9.8 epss: "51%" vendor: "Linux" kev: false exploited: false published: "2026-06-24 08:16:21" tags: [cve, security, critical] source: tsecurity.de CVE-Dossier exported: "2026-09-08T22:44:36+02:00" --- # CVE-2026-52914 > 9.8 CRITICAL ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix fragment reassembly length accounting batman-adv keeps a running payload length for queued fragments and uses it to validate a fragment chain before reassembly. That accounting currently allows the accumulated fragment length to be truncated during updates. As a result, malformed fragment chains can bypass the intended validation and drive reassembly with inconsistent length state, leading to a local denial of service. Fix the accounting by storing the accumulated length in a length-typed field and rejecting update overflows before the existing validation logic runs. The fix was verified against the original reproducer and against valid fragment reassembly paths. ## CVSS-Vektor ``` CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ``` | Metrik | Wert | Bewertung | |---|---|---| | AV Angriffsvektor | Netzwerk | bad | | AC Komplexität | Gering | bad | | PR Privilegien | Keine | bad | | UI Interaktion | Keine | bad | | S Scope | Unverändert | good | | C Vertraulichkeit | Hoch | bad | | I Integrität | Hoch | bad | | A Verfügbarkeit | Hoch | bad | ## Patch verfügbar (OSV) - Kernel ≥ 5.10.258 - Kernel ≥ 5.15.209 - Kernel ≥ 6.1.175 - Kernel ≥ 6.6.142 - Kernel ≥ 6.12.92 - Kernel ≥ 6.18.34 - Kernel ≥ 7.0.11 ## Referenzen - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-52914) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_