MEDIUM 6.5 NVD
CVE-2026-81666
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-b
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.
References
- https://access.redhat.com/security/cve/CVE-2026-81666
- https://bugzilla.redhat.com/show_bug.cgi?id=2524923
This medium severity vulnerability with a CVSS score of 6.5 was published on 2026-09-04 via NVD.
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