Red Hat Security Advisory: RHTAS 1.3.7 - Red Hat Trusted Artifact Signer Release
Description
The resource-agents packages provide the Pacemaker and RGManager service managers with a set of scripts. These scripts interface with several services to allow operating in a high-availability (HA) environment. Security Fix(es): * pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values (CVE-2026-59886) 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The fence-agents packages in Red Hat Enterprise Linux 8 include scripts for remote power management of cluster devices. A vulnerability identified as CVE-2026-59886 in the pyasn1 library used by these packages allows denial of service via crafted ASN.1 REAL values. This can cause the affected software to crash or become unresponsive. Red Hat has issued a security advisory and released updated fence-agents packages to fix this issue. The vulnerability is rated as high severity and affects multiple variants of Red Hat Enterprise Linux 8 including High Availability and Resilient Storage editions.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions in cluster management operations by crashing or disrupting the fence-agents processes. This may impact the ability to manage failed or unreachable nodes in a cluster environment, potentially affecting cluster stability and availability. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released an official security update that fixes this vulnerability in fence-agents packages for Red Hat Enterprise Linux 8. Users should apply the update as soon as possible to remediate the issue. For detailed instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. Since a patch is available, applying the official fix is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hm4w-wwcw-mr6r
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-59886"]
- Ecosystems
- ["PyPI"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a600ac89c2644c7f8fe3c03
Added to database: 07/22/2026, 00:11:52 UTC
Last enriched: 08/11/2026, 19:54:12 UTC
Last updated: 10/19/2026, 06:48:18 UTC
Views: 131
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