CVE-2026-81665
CVSS 7.5 · YüksekNVD: Awaiting Analysis
Açıklama (NVD)
A heap-based buffer overflow was found in Corosync's Totem Process Group (totempg) message reassembly. When processing fragmented multicast messages, the buffer used to reassemble fragments lacks a runtime bounds check in release builds. A network-adjacent attacker able to send crafted multicast protocol messages to the cluster could cause a heap buffer overflow with attacker-controlled data. This can crash the Corosync daemon, causing a denial of service to the entire cluster, and may potentially allow further exploitation given sufficient heap-corruption control.
Yayın: 04.09.2026 · Son değişiklik: 02.11.2026 · Zayıflık: CWE-122
CVSS 3.1 metrikleri
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
| Saldırı vektörü | Komşu ağ |
| Karmaşıklık | Yüksek |
| Gereken yetki | Yok |
| Kullanıcı etkileşimi | Gerekmez |
| Kapsam | Değişmez |
| Gizlilik | Yüksek |
| Bütünlük | Yüksek |
| Erişilebilirlik | Yüksek |
Hesaplanan temel puan: 7.5. CVSS hesaplayıcıda incele
Referanslar
- https://access.redhat.com/errata/RHSA-2026:67872
- https://access.redhat.com/errata/RHSA-2026:67873
- https://access.redhat.com/errata/RHSA-2026:67878
- https://access.redhat.com/errata/RHSA-2026:67879
- https://access.redhat.com/errata/RHSA-2026:67880
- https://access.redhat.com/errata/RHSA-2026:67881
- https://access.redhat.com/errata/RHSA-2026:68574
- https://access.redhat.com/errata/RHSA-2026:69277
- https://access.redhat.com/errata/RHSA-2026:69278
- https://access.redhat.com/errata/RHSA-2026:69279
- https://access.redhat.com/errata/RHSA-2026:69280
- https://access.redhat.com/security/cve/CVE-2026-81665
- https://bugzilla.redhat.com/show_bug.cgi?id=2524910