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 8 contain two security vulnerabilities: CVE-2026-35091, which permits denial of service and information disclosure through a crafted UDP packet, and CVE-2026-35092, which allows denial of service via an integer overflow during join message validation. Both vulnerabilities are rated with moderate severity by Red Hat Product Security. The advisory RHSA-2026:13657 provides updated corosync packages to fix these issues across various architectures and product variants of Red Hat Enterprise Linux 8.
Potential Impact
Exploitation of CVE-2026-35091 can lead to denial of service and unauthorized information disclosure. CVE-2026-35092 can cause denial of service by triggering an integer overflow. Both vulnerabilities impact availability and confidentiality of cluster services relying on corosync. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released security updates for corosync in Red Hat Enterprise Linux 8 to address these vulnerabilities. Users should apply the official patches provided in advisory RHSA-2026:13657 as soon as possible. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are indicated by the vendor advisory.
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.
CVSS v3.1
Score 8.2high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The corosync packages in Red Hat Enterprise Linux 8 contain two security vulnerabilities: CVE-2026-35091, which permits denial of service and information disclosure through a crafted UDP packet, and CVE-2026-35092, which allows denial of service via an integer overflow during join message validation. Both vulnerabilities are rated with moderate severity by Red Hat Product Security. The advisory RHSA-2026:13657 provides updated corosync packages to fix these issues across various architectures and product variants of Red Hat Enterprise Linux 8.
Potential Impact
Exploitation of CVE-2026-35091 can lead to denial of service and unauthorized information disclosure. CVE-2026-35092 can cause denial of service by triggering an integer overflow. Both vulnerabilities impact availability and confidentiality of cluster services relying on corosync. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released security updates for corosync in Red Hat Enterprise Linux 8 to address these vulnerabilities. Users should apply the official patches provided in advisory RHSA-2026:13657 as soon as possible. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:13657
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- 3.1
Threat ID: 6a160959e29bf47b50621379
Added to database: 05/26/2026, 20:58:01 UTC
Last enriched: 06/26/2026, 01:11:12 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 81
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