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 10 contain two security vulnerabilities: CVE-2026-35091 enables denial of service and information disclosure through crafted UDP packets, and CVE-2026-35092 enables denial of service via an integer overflow during join message validation. These vulnerabilities affect the Corosync Cluster Engine and its C APIs. Red Hat has issued a security advisory (RHSA-2026:19043) with updates to fix these issues. The advisory covers multiple Red Hat Enterprise Linux 10 variants including High Availability and CodeReady Linux Builder editions across various architectures.
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 an integer overflow. Both vulnerabilities impact cluster communication components, potentially disrupting cluster operations and exposing sensitive data. Red Hat rates the overall impact as moderate.
Mitigation Recommendations
Red Hat has released updated corosync packages that address these vulnerabilities for Red Hat Enterprise Linux 10 and related variants. Users should apply the security updates as described in Red Hat advisory RHSA-2026:19043. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No indication of alternative mitigations or 'no action required' is provided; applying the official patches is the recommended remediation.
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 10 contain two security vulnerabilities: CVE-2026-35091 enables denial of service and information disclosure through crafted UDP packets, and CVE-2026-35092 enables denial of service via an integer overflow during join message validation. These vulnerabilities affect the Corosync Cluster Engine and its C APIs. Red Hat has issued a security advisory (RHSA-2026:19043) with updates to fix these issues. The advisory covers multiple Red Hat Enterprise Linux 10 variants including High Availability and CodeReady Linux Builder editions across various architectures.
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 an integer overflow. Both vulnerabilities impact cluster communication components, potentially disrupting cluster operations and exposing sensitive data. Red Hat rates the overall impact as moderate.
Mitigation Recommendations
Red Hat has released updated corosync packages that address these vulnerabilities for Red Hat Enterprise Linux 10 and related variants. Users should apply the security updates as described in Red Hat advisory RHSA-2026:19043. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No indication of alternative mitigations or 'no action required' is provided; applying the official patches is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19043
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- null
Threat ID: 6a160959e29bf47b5062135d
Added to database: 05/26/2026, 20:58:01 UTC
Last enriched: 06/26/2026, 01:00:11 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 57
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