CVE-2026-81665
7.5 ÉlevéeDescription
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.
Produits concernés
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- Red Hat Enterprise Linux 9.6 Extended Update Support
- Red Hat OpenShift Container Platform 4
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.5 Élevée | secalert@redhat.com | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Faiblesses (CWE)
Références
- 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