Red Hat Security Advisory: fence-agents security update
Affects Red Hat fence-agentsSource GCVE Database
Not known to be exploited.
Data as of 31 Oct 2026, 20:20 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 9 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.
What to do
AI-suggested
Red Hat has released an updated fence-agents package for Red Hat Enterprise Linux 9.2 that addresses this vulnerability. Users should apply the security update as described in the Red Hat advisory RHSA-2026:2300 to remediate the issue. No additional mitigation steps are indicated beyond applying the official patch.
Description
A denial of service vulnerability (CVE-2026-23490) exists in the pyasn1 component used by the fence-agents packages in Red Hat Enterprise Linux 9.2. The flaw is caused by memory exhaustion triggered by malformed RELATIVE-OID inputs. Fence-agents are scripts used for remote power management in cluster environments to forcibly restart and remove failed nodes. This security issue has been rated as important by Red Hat and is addressed in an update for Red Hat Enterprise Linux 9.2.