Red Hat Security Advisory: kernel-rt security update
Affects Linux kernelSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited.
Data as of 29 Oct 2026, 14:41 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 30 Mar 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 29 Oct 2026.
What to do
AI-suggested
Red Hat has released an official security update for the kernel-rt packages addressing these vulnerabilities. Users should apply the update as described in the Red Hat advisory RHSA-2026:6036 and reboot affected systems to ensure the fixes take effect. No additional mitigations are specified or required beyond applying the official patch.
Description
This advisory addresses multiple security vulnerabilities in the Red Hat Real Time Linux Kernel (kernel-rt) packages. The issues include a Use-After-Free vulnerability in the ATM subsystem (CVE-2025-38180), an error recovery flaw in the macvlan component (CVE-2026-23209), and a kernel network scheduler issue (CVE-2026-23204). These vulnerabilities have been rated with moderate security impact by Red Hat. The update requires a system reboot to take effect and is targeted at Red Hat Enterprise Linux for Real Time 8 and related variants.
References
- access.redhat.com/errata/RHSA-2026:6036 (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=2439900 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2439931 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6036.json (opens in a new tab)