Red Hat Security Advisory: runc security update
Affects Red Hat runcSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.3 High.
Data as of 26 Oct 2026, 09:15 UTC
- EPSS
- 1.2% chance of exploitation in 30 days – higher than 69% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/runcpkg:rpm/redhat/runcOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated runC packages addressing these vulnerabilities. Users should apply the security update described in advisory RHSA-2025:20957 promptly to remediate the issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No indication of active exploitation in the wild has been reported. Applying the official patches is the recommended mitigation.
Description
The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime. Security Fix(es): * runc: container escape via 'masked path' abuse due to mount race conditions (CVE-2025-31133) * runc: container escape with malicious config due to /dev/console mount and related races (CVE-2025-52565) * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881) 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.
References
- access.redhat.com/errata/RHSA-2025:20957 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2404705 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2404708 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2404715 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_20957.json (opens in a new tab)