Описание
Security update for corosync
This update for corosync fixes the following issues:
- CVE-2026-81665: heap-based buffer overflow in totempg assembly buffer during fragmented message reassembly (bsc#1278738).
- CVE-2026-81666: integer overflow in check_memb_commit_token_sanity may bypass message length validation on 32-bit systems (bsc#1278739).
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1278738
- SUSE Bug 1278739
- SUSE CVE CVE-2026-81665 page
- SUSE CVE CVE-2026-81666 page
Описание
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.
Затронутые продукты
Ссылки
- CVE-2026-81665
- SUSE Bug 1278738
Описание
An integer overflow was found in Corosync's handling of membership commit token messages. The length-validation check for these messages can be bypassed on 32-bit systems due to an integer overflow in the calculation of the expected message length, allowing a crafted network packet to trigger an out-of-bounds memory access that crashes the Corosync daemon. This results in a denial of service for the affected cluster node. The overflow does not occur on 64-bit systems, where the length calculation is correctly performed in 64-bit arithmetic.
Затронутые продукты
Ссылки
- CVE-2026-81666
- SUSE Bug 1278739