CVE-2026-35091
Description
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
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| debian | bookworm | fixed | 3.1.7-1+deb12u2 |
| debian | bullseye | affected | |
| debian | forky | fixed | 3.1.10-2 |
| debian | sid | fixed | 3.1.10-2 |
| debian | trixie | fixed | 3.1.9-2+deb13u1 |
| sles | affected | | |
| rocky | 9 | fixed | |
| rhel | 7.0 | affected | |
| rhel | 8.0 | affected | |
| rhel | 9.0 | affected | |
| rhel | 10.0 | affected | |
References
- https://access.redhat.com/errata/RHSA-2026:13673
- https://access.redhat.com/errata/RHSA-2026:19200
- https://access.redhat.com/errata/RHSA-2026:13644
- https://access.redhat.com/errata/RHSA-2026:13657
- https://access.redhat.com/errata/RHSA-2026:14205
- https://access.redhat.com/errata/RHSA-2026:14210
- https://access.redhat.com/errata/RHSA-2026:14211
- https://access.redhat.com/errata/RHSA-2026:14212
- https://access.redhat.com/errata/RHSA-2026:14213
- https://access.redhat.com/errata/RHSA-2026:14214
- https://access.redhat.com/errata/RHSA-2026:14215
- https://access.redhat.com/errata/RHSA-2026:14216
- https://access.redhat.com/errata/RHSA-2026:19043
- https://access.redhat.com/errata/RHSA-2026:20916
- https://access.redhat.com/security/cve/CVE-2026-35091
- https://bugzilla.redhat.com/show_bug.cgi?id=2453169
- https://bugzilla.redhat.com/show_bug.cgi?id=2453813
- https://security-tracker.debian.org/tracker/CVE-2026-35091
- https://www.suse.com/security/cve/CVE-2026-35091.html
- https://bugzilla.redhat.com/2453813
- https://bugzilla.redhat.com/2453814
- https://errata.almalinux.org/8/ALSA-2026-13657.html
- https://errata.almalinux.org/9/ALSA-2026-13673.html
- https://errata.rockylinux.org/RLSA-2026:13673
CWEs
CWE-253
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.