PT-2026-29517 · Corosync · Corosync

Sebasteuo / 0Xs4Bb1 + 1 · Published 2026-04-01 · Updated 2026-04-01 · CVE-2026-35092

Positive Technologies · (AI Summary)

CVSS v3.1

7.5

High

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Corosync (affected versions not specified)

Description A flaw exists in Corosync where an integer overflow in the join message sanity validation can be triggered by sending crafted User Datagram Protocol (UDP) packets. This allows a remote, unauthenticated attacker to cause a denial of service by crashing the service. This vulnerability specifically impacts Corosync deployments using totemudp/totemudpu mode.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-35092

Affected Products

Corosync

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-35092 · Security Note
• https://twitter.com/CVEnew/status/2039372057176064391 · Twitter Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2453814 · Note
• https://access.redhat.com/security/cve/CVE-2026-35092 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2453169 · Note