Red Hat Security Advisory: fence-agents security update
Affects Red Hat fence-agentsSource GCVE Database
Not known to be exploited : upgrade Red Hat fence-agents to 8.6.1 soon.
Data as of 30 Oct 2026, 11:52 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 8.6.1
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Aug 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 30 Oct 2026.
What to do
Upgrade Red Hat fence-agents to 8.6.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Product Security Red Hat | Affected
| Fixed in
|
AI-suggested
Red Hat has released updated fence-agents packages that fix this vulnerability. Users of affected Red Hat Enterprise Linux 8.6 versions should apply the security update as described in the Red Hat advisory RHSA-2026:58835. Detailed instructions for applying the update are available at https://access.redhat.com/articles/11258. Since a fix is available, applying the official patch is the recommended mitigation.
Description
A security update for the fence-agents package in Red Hat Enterprise Linux addresses a denial of service vulnerability in the pyasn1 library. The vulnerability (CVE-2026-59886) involves crafted ASN.1 REAL values that can cause a denial of service. Fence-agents are used for remote power management in cluster environments to forcibly restart and remove failed or unreachable nodes. Red Hat has rated this update as important and has released patches for affected versions of Red Hat Enterprise Linux 8.6.