CVE-2026-35092: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
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.
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 crafted UDP packets that cause the Corosync service to crash, leading to denial of service. The issue specifically affects Corosync configured with totemudp/totemudp mode. Red Hat has issued security advisories (RHSA-2026:13644 for RHEL 10 and RHSA-2026:13657 for RHEL 8) providing updated Corosync packages that fix this vulnerability. The vulnerability is tracked as CVE-2026-35092 with a CVSS score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Potential Impact
Successful exploitation results in denial of service by crashing the Corosync service. There is no impact on confidentiality or integrity as per the CVSS vector. The vulnerability can be triggered remotely without authentication or user interaction. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Corosync packages that address this vulnerability. Users of Red Hat Enterprise Linux 10 and 8 should apply the security updates referenced in advisories RHSA-2026:13644 and RHSA-2026:13657 respectively. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the vulnerability. No additional mitigation steps are required beyond applying the vendor-provided updates.
CVE-2026-35092: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
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.
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 crafted UDP packets that cause the Corosync service to crash, leading to denial of service. The issue specifically affects Corosync configured with totemudp/totemudp mode. Red Hat has issued security advisories (RHSA-2026:13644 for RHEL 10 and RHSA-2026:13657 for RHEL 8) providing updated Corosync packages that fix this vulnerability. The vulnerability is tracked as CVE-2026-35092 with a CVSS score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Potential Impact
Successful exploitation results in denial of service by crashing the Corosync service. There is no impact on confidentiality or integrity as per the CVSS vector. The vulnerability can be triggered remotely without authentication or user interaction. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Corosync packages that address this vulnerability. Users of Red Hat Enterprise Linux 10 and 8 should apply the security updates referenced in advisories RHSA-2026:13644 and RHSA-2026:13657 respectively. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the vulnerability. No additional mitigation steps are required beyond applying the vendor-provided updates.
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: 4/1/2026, 1:38:38 PM
Last enriched: 5/20/2026, 6:17:57 PM
Last updated: 5/21/2026, 10:29:24 PM
Views: 65
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