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VulnerabilityPublished Updated

CVE-2026-35092: Red Hat Enterprise Linux 10 · Integer Overflow or Wraparound

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.0% chance of exploitation in 30 days – higher than 63% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10corosyncAffected–Fixed in–
Red Hat Enterprise Linux 10corosyncAffected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update SupportcorosyncAffected–Fixed in–
Red Hat Enterprise Linux 7 Extended Lifecycle SupportcorosyncAffected–Fixed in–
Red Hat Enterprise Linux 8corosyncAffected–Fixed in–
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportcorosyncAffected–Fixed in–

AI-suggested

Red Hat has released official security updates for Corosync that address this vulnerability. Users should apply the updated Corosync packages as detailed in Red Hat advisories RHSA-2026:13644 and RHSA-2026:13657. The advisories provide instructions and links for applying the patches on affected Red Hat Enterprise Linux 10 and 8 systems. Applying these updates fully mitigates the vulnerability. No additional mitigation actions are required beyond applying the vendor-provided patches.

Description

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.

References

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