Red Hat Security Advisory: corosync security update
The corosync packages provide the Corosync Cluster Engine and C APIs for Red Hat Enterprise Linux cluster software. Security Fix(es): * corosync: Corosync: Denial of Service and information disclosure via crafted UDP packet (CVE-2026-35091) * corosync: Corosync: Denial of Service via integer overflow in join message validation (CVE-2026-35092) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The corosync packages in Red Hat Enterprise Linux 9 contain two security vulnerabilities. CVE-2026-35091 involves denial of service and information disclosure triggered by a crafted UDP packet. CVE-2026-35092 involves denial of service caused by an integer overflow during join message validation. These vulnerabilities affect multiple Red Hat Enterprise Linux 9 variants including High Availability and CodeReady Linux Builder. Red Hat has released updated packages to fix these issues as detailed in advisory RHSA-2026:13673.
Potential Impact
Successful exploitation of CVE-2026-35091 can cause denial of service and potentially disclose information via crafted UDP packets. CVE-2026-35092 can cause denial of service through integer overflow in message validation. Both vulnerabilities impact the availability and confidentiality of cluster services running Corosync on affected Red Hat Enterprise Linux 9 systems.
Mitigation Recommendations
Red Hat has released updated corosync packages to address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13673 and the referenced update article https://access.redhat.com/articles/11258. No additional mitigations are specified by the vendor. Patch status is confirmed as an official fix available.
Red Hat Security Advisory: corosync security update
Description
The corosync packages provide the Corosync Cluster Engine and C APIs for Red Hat Enterprise Linux cluster software. Security Fix(es): * corosync: Corosync: Denial of Service and information disclosure via crafted UDP packet (CVE-2026-35091) * corosync: Corosync: Denial of Service via integer overflow in join message validation (CVE-2026-35092) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The corosync packages in Red Hat Enterprise Linux 9 contain two security vulnerabilities. CVE-2026-35091 involves denial of service and information disclosure triggered by a crafted UDP packet. CVE-2026-35092 involves denial of service caused by an integer overflow during join message validation. These vulnerabilities affect multiple Red Hat Enterprise Linux 9 variants including High Availability and CodeReady Linux Builder. Red Hat has released updated packages to fix these issues as detailed in advisory RHSA-2026:13673.
Potential Impact
Successful exploitation of CVE-2026-35091 can cause denial of service and potentially disclose information via crafted UDP packets. CVE-2026-35092 can cause denial of service through integer overflow in message validation. Both vulnerabilities impact the availability and confidentiality of cluster services running Corosync on affected Red Hat Enterprise Linux 9 systems.
Mitigation Recommendations
Red Hat has released updated corosync packages to address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13673 and the referenced update article https://access.redhat.com/articles/11258. No additional mitigations are specified by the vendor. Patch status is confirmed as an official fix available.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:13673
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- null
Threat ID: 6a160959e29bf47b50621372
Added to database: 05/26/2026, 20:58:01 UTC
Last enriched: 06/26/2026, 01:11:06 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 70
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