Red Hat Security Advisory: kernel security update
Affects Linux kernelSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited.
Data as of 5 Nov 2026, 16:03 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Exploitation evidence
Disclosed: evidence found.
CVE published 8 Apr 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 5 Nov 2026.
What to do
AI-suggested
Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9.6 Extended Update Support and related variants should apply the provided kernel update promptly. A system reboot is required for the update to take effect. Refer to Red Hat's official advisory and update instructions at https://access.redhat.com/articles/11258 for detailed guidance.
Description
Red Hat has issued a security advisory for a kernel update addressing two use-after-free vulnerabilities in the Linux kernel. The first vulnerability (CVE-2025-38180) affects the ATM subsystem, and the second (CVE-2026-23231) involves privilege escalation or denial of service via use-after-free in nf_tables_addchain(). These vulnerabilities have been rated with moderate severity by Red Hat Product Security. The update is available for Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. A system reboot is required after applying the update.
References
- access.redhat.com/errata/RHSA-2026:6940 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2376376 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2444376 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6940.json (opens in a new tab)