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 for Red Hat Enterprise Linux 10 contain two vulnerabilities: CVE-2026-35091 allows denial of service and information disclosure through crafted UDP packets, and CVE-2026-35092 allows denial of service via an integer overflow during join message validation. These issues affect multiple Red Hat Enterprise Linux 10 variants, including High Availability and CodeReady Linux Builder editions. Red Hat has released updated corosync packages to fix these vulnerabilities as detailed in advisory RHSA-2026:13644. No CVSS base scores are provided in the advisory, but the severity is rated as moderate.
Potential Impact
Successful exploitation of CVE-2026-35091 can lead to denial of service and unauthorized information disclosure. CVE-2026-35092 can cause denial of service due to integer overflow in message validation. These impacts could disrupt cluster operations and potentially expose sensitive cluster information. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated corosync packages for Red Hat Enterprise Linux 10 and its variants to address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13644 and the referenced update article (https://access.redhat.com/articles/11258). No alternative mitigations or workarounds are specified. Patch status is confirmed as 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 for Red Hat Enterprise Linux 10 contain two vulnerabilities: CVE-2026-35091 allows denial of service and information disclosure through crafted UDP packets, and CVE-2026-35092 allows denial of service via an integer overflow during join message validation. These issues affect multiple Red Hat Enterprise Linux 10 variants, including High Availability and CodeReady Linux Builder editions. Red Hat has released updated corosync packages to fix these vulnerabilities as detailed in advisory RHSA-2026:13644. No CVSS base scores are provided in the advisory, but the severity is rated as moderate.
Potential Impact
Successful exploitation of CVE-2026-35091 can lead to denial of service and unauthorized information disclosure. CVE-2026-35092 can cause denial of service due to integer overflow in message validation. These impacts could disrupt cluster operations and potentially expose sensitive cluster information. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated corosync packages for Red Hat Enterprise Linux 10 and its variants to address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13644 and the referenced update article (https://access.redhat.com/articles/11258). No alternative mitigations or workarounds are specified. Patch status is confirmed as 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-2026:13644
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- null
Threat ID: 6a160959e29bf47b50621364
Added to database: 05/26/2026, 20:58:01 UTC
Last enriched: 06/26/2026, 01:11:24 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 67
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