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 cluster software contain two security flaws: CVE-2026-35091 allows denial of service and information disclosure via crafted UDP packets, and CVE-2026-35092 allows denial of service through an integer overflow during join message validation. These vulnerabilities affect multiple Red Hat Enterprise Linux 9.0 variants, including High Availability and Resilient Storage editions. Red Hat has issued a security advisory (RHSA-2026:14211) with updated corosync packages to fix these issues. No CVSS scores are provided in the advisory, but the impact is assessed as moderate. No known exploits in the wild have been reported. The advisory includes detailed package updates and instructions for applying the fixes.
Potential Impact
Successful exploitation of CVE-2026-35091 can lead to denial of service and potential information disclosure via crafted UDP packets. CVE-2026-35092 can cause denial of service due to an integer overflow in join message validation. These impacts can disrupt cluster operations and potentially expose sensitive information. The overall security impact is rated moderate by Red Hat Product Security. No evidence of active exploitation in the wild has been reported.
Mitigation Recommendations
Red Hat has released updated corosync packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.0 variants, including High Availability and Resilient Storage, should apply the security updates as described in Red Hat advisory RHSA-2026:14211 and the referenced update article (https://access.redhat.com/articles/11258). Applying these updates will remediate the denial of service and information disclosure issues. No additional mitigation steps are indicated by the vendor.
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 cluster software contain two security flaws: CVE-2026-35091 allows denial of service and information disclosure via crafted UDP packets, and CVE-2026-35092 allows denial of service through an integer overflow during join message validation. These vulnerabilities affect multiple Red Hat Enterprise Linux 9.0 variants, including High Availability and Resilient Storage editions. Red Hat has issued a security advisory (RHSA-2026:14211) with updated corosync packages to fix these issues. No CVSS scores are provided in the advisory, but the impact is assessed as moderate. No known exploits in the wild have been reported. The advisory includes detailed package updates and instructions for applying the fixes.
Potential Impact
Successful exploitation of CVE-2026-35091 can lead to denial of service and potential information disclosure via crafted UDP packets. CVE-2026-35092 can cause denial of service due to an integer overflow in join message validation. These impacts can disrupt cluster operations and potentially expose sensitive information. The overall security impact is rated moderate by Red Hat Product Security. No evidence of active exploitation in the wild has been reported.
Mitigation Recommendations
Red Hat has released updated corosync packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.0 variants, including High Availability and Resilient Storage, should apply the security updates as described in Red Hat advisory RHSA-2026:14211 and the referenced update article (https://access.redhat.com/articles/11258). Applying these updates will remediate the denial of service and information disclosure issues. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:14211
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- null
Threat ID: 6a160959e29bf47b506208f0
Added to database: 05/26/2026, 20:58:01 UTC
Last enriched: 06/26/2026, 01:09:33 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 56
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