Home/CVE/A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a re
CVE

CVE-2026-35092

A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a re

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.

HIGH · CVSS 7.5 EPSS 0.00364
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
▤

Affected Products & Versions

3
corosyncall versions
redhat openshiftall versions
redhat enterprise linuxall versions
⚠

Public Exploits & PoCs

1
pocbugzilla.redhat.com · show_bug.cgi?id=2453169bugzilla.redhat.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Apr 2026 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

19
suse-csafSUSE-SU-2026:1394-1
usnUSN-8170-1
suse-csafopenSUSE-SU-2026:20505-1
suse-csafSUSE-SU-2026:21224-1
suse-csafSUSE-SU-2026:21285-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2026-35092Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=2453814Issue TrackingThird Party Advisory
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