Red Hat Security Advisory: OpenShift Container Platform 4.21.37 bug fix and security update
Affects Red HatSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 07:25 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 13 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
AI-suggested
A fix is available in Red Hat OpenShift Container Platform 4.21.37. Users should upgrade to this version by applying the updated container images and RPM packages as soon as they are available in the appropriate release channels. Upgrades can be performed using the OpenShift CLI (oc) or the web console. Detailed upgrade instructions are provided by Red Hat in their official documentation. No additional mitigation steps are indicated beyond applying the update.
Description
Red Hat OpenShift Container Platform 4.21.37 includes a security update addressing a vulnerability in the kernel's xfrm module related to validation of the routing header segments_left field (CVE-2026-80844). This update fixes a security issue rated as Important by Red Hat Product Security. Users of OpenShift Container Platform 4.21 are advised to upgrade to the updated packages and container images to mitigate this vulnerability.