Red Hat Security Advisory: fence-agents security update
A security vulnerability (CVE-2026-30922) affecting the pyasn1 component used by fence-agents in Red Hat Enterprise Linux 9.2 has been identified. The issue involves a denial of service via unbounded recursion. Fence-agents are scripts that manage remote power control for cluster devices, allowing failed nodes to be forcibly restarted and removed. Red Hat has issued an important security update to address this vulnerability in multiple Red Hat Enterprise Linux 9.2 variants, including High Availability and Resilient Storage editions.
AI Analysis
Technical Summary
The resource-agents packages in Red Hat Enterprise Linux 8 High Availability and Resilient Storage include scripts that interface with various services to enable high-availability environments. These packages use the pyasn1 library, which is vulnerable to a denial of service condition caused by unbounded recursion (CVE-2026-30922). This vulnerability can cause the affected service to crash or become unresponsive. Red Hat has released an update (resource-agents-4.9.0-54.el8_10.33) that fixes this issue. The advisory rates the security impact as Important and provides updated packages for multiple architectures and variants of Red Hat Enterprise Linux 8.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by triggering unbounded recursion in the pyasn1 library used by resource-agents. This can disrupt high-availability service management, potentially causing service interruptions in environments relying on Pacemaker or RGManager. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has provided an official security update fixing this vulnerability in resource-agents version 4.9.0-54.el8_10.33 for Red Hat Enterprise Linux 8 High Availability and Resilient Storage variants. Users should apply this update promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. No additional mitigation is required beyond applying the official patch.
Red Hat Security Advisory: fence-agents security update
Description
A security vulnerability (CVE-2026-30922) affecting the pyasn1 component used by fence-agents in Red Hat Enterprise Linux 9.2 has been identified. The issue involves a denial of service via unbounded recursion. Fence-agents are scripts that manage remote power control for cluster devices, allowing failed nodes to be forcibly restarted and removed. Red Hat has issued an important security update to address this vulnerability in multiple Red Hat Enterprise Linux 9.2 variants, including High Availability and Resilient Storage editions.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The resource-agents packages in Red Hat Enterprise Linux 8 High Availability and Resilient Storage include scripts that interface with various services to enable high-availability environments. These packages use the pyasn1 library, which is vulnerable to a denial of service condition caused by unbounded recursion (CVE-2026-30922). This vulnerability can cause the affected service to crash or become unresponsive. Red Hat has released an update (resource-agents-4.9.0-54.el8_10.33) that fixes this issue. The advisory rates the security impact as Important and provides updated packages for multiple architectures and variants of Red Hat Enterprise Linux 8.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by triggering unbounded recursion in the pyasn1 library used by resource-agents. This can disrupt high-availability service management, potentially causing service interruptions in environments relying on Pacemaker or RGManager. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has provided an official security update fixing this vulnerability in resource-agents version 4.9.0-54.el8_10.33 for Red Hat Enterprise Linux 8 High Availability and Resilient Storage variants. Users should apply this update promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. No additional mitigation is required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20588
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a16097ce29bf47b5064910a
Added to database: 05/26/2026, 20:58:36 UTC
Last enriched: 07/19/2026, 22:54:04 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 54
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