CVEvulnerability

CVE-2026-81666

6.5 MEDIUM Published 2026-09-04 Modified 2026-10-21 Official page ↗
Status
Awaiting Analysis
Published
2026-09-04
Last modified
2026-10-21
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-190

Description

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.

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References