CVE-2026-35092: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
CVE-2026-35092 is an integer overflow vulnerability in the Corosync Cluster Engine used in Red Hat Enterprise Linux 10. It allows a remote, unauthenticated attacker to send crafted UDP packets that trigger an integer overflow during join message sanity validation. This flaw can cause the Corosync service to crash, resulting in a denial of service condition. The vulnerability affects Corosync deployments configured to use totemudp/totemudp mode. Red Hat has released security updates addressing this issue with a security impact rated as Moderate in their advisories. The CVSS v3.1 base score is 7.5, indicating high severity due to network attack vector and no required privileges or user interaction. No known exploits in the wild have been reported at this time.
AI Analysis
Technical Summary
An integer overflow vulnerability exists in Corosync's join message sanity validation in Red Hat Enterprise Linux 10. This flaw allows remote attackers to send specially crafted UDP packets that cause the Corosync service to crash, leading to denial of service. The issue specifically impacts Corosync configured with totemudp/totemudp mode. Red Hat has issued security advisories (RHSA-2026:13644 and RHSA-2026:13657) providing updated Corosync packages that fix this vulnerability. The advisories cover multiple architectures and Red Hat Enterprise Linux versions 8 and 10. The vulnerability has a CVSS score of 7.5 and is rated as Moderate by Red Hat Product Security. No exploits in the wild are currently known.
Potential Impact
Successful exploitation results in denial of service by crashing the Corosync service on affected Red Hat Enterprise Linux 10 systems. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered remotely without authentication or user interaction, making it a high-risk availability issue. No known active exploitation has been observed.
Mitigation Recommendations
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.
CVE-2026-35092: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-35092 is an integer overflow vulnerability in the Corosync Cluster Engine used in Red Hat Enterprise Linux 10. It allows a remote, unauthenticated attacker to send crafted UDP packets that trigger an integer overflow during join message sanity validation. This flaw can cause the Corosync service to crash, resulting in a denial of service condition. The vulnerability affects Corosync deployments configured to use totemudp/totemudp mode. Red Hat has released security updates addressing this issue with a security impact rated as Moderate in their advisories. The CVSS v3.1 base score is 7.5, indicating high severity due to network attack vector and no required privileges or user interaction. No known exploits in the wild have been reported at this time.
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An integer overflow vulnerability exists in Corosync's join message sanity validation in Red Hat Enterprise Linux 10. This flaw allows remote attackers to send specially crafted UDP packets that cause the Corosync service to crash, leading to denial of service. The issue specifically impacts Corosync configured with totemudp/totemudp mode. Red Hat has issued security advisories (RHSA-2026:13644 and RHSA-2026:13657) providing updated Corosync packages that fix this vulnerability. The advisories cover multiple architectures and Red Hat Enterprise Linux versions 8 and 10. The vulnerability has a CVSS score of 7.5 and is rated as Moderate by Red Hat Product Security. No exploits in the wild are currently known.
Potential Impact
Successful exploitation results in denial of service by crashing the Corosync service on affected Red Hat Enterprise Linux 10 systems. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered remotely without authentication or user interaction, making it a high-risk availability issue. No known active exploitation has been observed.
Mitigation Recommendations
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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-04-01T11:35:23.146Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/errata/RHSA-2026:13644","vendor":"Red Hat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-35092","vendor":"Red Hat"}]
Threat ID: 69cd1fdee6bfc5ba1dd19c10
Added to database: 04/01/2026, 13:38:38 UTC
Last enriched: 06/04/2026, 20:52:24 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 140
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.