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CVE-2026-74581VulnerabilityPublished Updated

Red Hat Security Advisory: kernel-rt security update

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 31 Oct 2026, 11:08 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

AI-suggested

Red Hat has released updated kernel-rt packages for Red Hat Enterprise Linux 9.2 that fix this vulnerability. Users should apply the security update as soon as possible and reboot their systems to ensure the fix takes effect. Red Hat strongly advises against delaying the update to avoid exposure to this vulnerability.

Description

A use-after-free vulnerability (CVE-2026-74581) exists in the IPv6 networking code of the Real Time Linux Kernel (kernel-rt) used in Red Hat Enterprise Linux 9.2. This flaw is due to a stale pointer in fib6_rule_suppress. Red Hat has issued a security update addressing this issue and recommends applying the update and rebooting affected systems. The vulnerability is rated as important by Red Hat Product Security.

References

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