CVE intelligence and bounded remediation

CVE-2026-35092 — A flaw was found in Corosync

High CVSS 7.5

A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.

Severity: High
CVSS: 7.5 (3.1)
Published: 2026-04-01
CISA KEV: Not currently listed
Ecosystem: software/application
Weaknesses: CWE-190

Affected products

corosync / corosync
redhat / openshift / 4.0
redhat / enterprise_linux / 7.0
redhat / enterprise_linux / 8.0
redhat / enterprise_linux / 9.0
redhat / enterprise_linux / 10.0

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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