PT-2026-29516 · Red Hat · Red Hat Enterprise Linux 10+4

Published 2026-04-01 · Updated 2026-04-01 · CVE-2026-35091

NVD

CVSS v3.1

8.2

High

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

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.

Fix

Weakness Enumeration

CWE-253

Related Identifiers

CVE-2026-35091

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Openshift Container Platform 4

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-35091 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-35091 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2453169 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2453813 · Note