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 7 Extended Lifecycle Support contain two security flaws. CVE-2026-35091 enables an attacker to cause denial of service and potentially disclose information by sending a crafted UDP packet to the Corosync Cluster Engine. CVE-2026-35092 involves an integer overflow in the validation of join messages, which can also lead to denial of service. Both vulnerabilities have been assigned a moderate security impact by Red Hat and are addressed in updated corosync packages provided in the RHSA-2026:20916 advisory.
Potential Impact
Successful exploitation of CVE-2026-35091 can cause denial of service and information disclosure. CVE-2026-35092 can cause denial of service via integer overflow. These impacts affect the availability and confidentiality of cluster services relying on corosync. No known exploits in the wild have been reported. The vulnerabilities affect cluster environments using Red Hat Enterprise Linux 7 Extended Lifecycle Support corosync packages.
Mitigation Recommendations
Red Hat has released updated corosync packages that fix these vulnerabilities as detailed in advisory RHSA-2026:20916. Users of affected Red Hat Enterprise Linux 7 Extended Lifecycle Support cluster software should apply the available security update promptly. For update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are specified 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.
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 7 Extended Lifecycle Support contain two security flaws. CVE-2026-35091 enables an attacker to cause denial of service and potentially disclose information by sending a crafted UDP packet to the Corosync Cluster Engine. CVE-2026-35092 involves an integer overflow in the validation of join messages, which can also lead to denial of service. Both vulnerabilities have been assigned a moderate security impact by Red Hat and are addressed in updated corosync packages provided in the RHSA-2026:20916 advisory.
Potential Impact
Successful exploitation of CVE-2026-35091 can cause denial of service and information disclosure. CVE-2026-35092 can cause denial of service via integer overflow. These impacts affect the availability and confidentiality of cluster services relying on corosync. No known exploits in the wild have been reported. The vulnerabilities affect cluster environments using Red Hat Enterprise Linux 7 Extended Lifecycle Support corosync packages.
Mitigation Recommendations
Red Hat has released updated corosync packages that fix these vulnerabilities as detailed in advisory RHSA-2026:20916. Users of affected Red Hat Enterprise Linux 7 Extended Lifecycle Support cluster software should apply the available security update promptly. For update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are specified 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-2026:20916
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-35092"]
- Cvss Version
- 3.1
Threat ID: 6a160958e29bf47b5061f25c
Added to database: 05/26/2026, 20:58:00 UTC
Last enriched: 06/28/2026, 00:15:58 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 60
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