Incorrect Check of Function Return Value Affecting corosync-vqsim package, versions <0:3.1.9-2.el9_7.1


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.73% (73rd percentile)

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  • Snyk IDSNYK-ORACLE9-COROSYNCVQSIM-16534789
  • published8 May 2026
  • disclosed1 Apr 2026

Introduced: 1 Apr 2026

CVE-2026-35091  (opens in a new tab)
CWE-253  (opens in a new tab)

How to fix?

Upgrade Oracle:9 corosync-vqsim to version 0:3.1.9-2.el9_7.1 or higher.
This issue was patched in ELSA-2026-13673.

NVD Description

Note: Versions mentioned in the description apply only to the upstream corosync-vqsim package and not the corosync-vqsim package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1