Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
Published Jun 16, 2026 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A flaw was found in Pacemaker. An unauthenticated remote attacker can exploit an integer overflow vulnerability in the remote message decompression process. By sending a specially crafted compressed remote message before authentication, an attacker can cause memory corruption, leading to a denial of service (DoS) in the CIB remote listener. This can result in the affected service crashing.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- RHSA-2026:39322 ↗
- RHSA-2026:39323 ↗
- RHSA-2026:40833 ↗
- RHSA-2026:41041 ↗
- RHSA-2026:41042 ↗
- RHSA-2026:41043 ↗
- RHSA-2026:41044 ↗
- RHSA-2026:42041 ↗
- RHSA-2026:42075 ↗
- RHSA-2026:42076 ↗
- RHSA-2026:43606 ↗
- access.redhat.com ↗
Record history
Published Jun 16, 2026 · Last refreshed Oct 23, 2026