GHSA-hmg2-5h4j-37m9 · Severity: high — A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value...
A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents
Conclusion & alert: CVE-2026-35091 is rated High Exploit Risk (64.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.24%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-08 | 0.28% | 0.24% | -0.04% |
| 2 | 2026-05-27 | 0.22% | 0.28% | +0.06% |
| 3 | 2026-05-22 | — | 0.22% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.2 | 3.1 | HIGH |
|
3.9 | 4.2 | [email protected] |
GHSA-hmg2-5h4j-37m9 · Severity: high — A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-35091 not yet assigned priority: Debian including 1 source packages (corosync), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-35091 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-35091 |
suse
|
high | CVE-2026-35091 severity important: SUSE including 27 source package names (corosync, corosync-2.4.6-150300.12.16.1, …), 82 product×package rows across 10 product lines (SUSE Linux Enterprise High Availability Extension 12 SP5, SUSE Linux Enterprise High Availability Extension 15 SP4, … (10 product lines)): Fixed 76, Known Not Affected 6. | https://www.suse.com/security/cve/CVE-2026-35091/ |
ubuntu
|
medium | CVE-2026-35091 medium priority: Ubuntu including 1 source packages (corosync), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 4, released 3. | https://ubuntu.com/security/CVE-2026-35091 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| corosync | corosync | — | cpe:2.3:a:corosync:corosync:-:*:*:*:*:*:*:* |
| redhat | openshift | 4.0 | cpe:2.3:a:redhat:openshift:4.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 10.0 | cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* |