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CVE-2026-43503VulnerabilityPublished Updated

Red Hat Security Advisory: kpatch-patch security update

Affects Red Hat kpatch-patchSource GCVE Database

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Mentioned vulnerabilities

Public exploit available (Metasploit).

Data as of 30 Oct 2026, 02:46 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    1 Metasploit module

  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 29 Oct 2026.

What to do

AI-suggested

Red Hat has released an official security update for the kpatch-patch module in Red Hat Enterprise Linux 9.4 that addresses these vulnerabilities. Users should apply the update as described in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issues. Since this is a kernel live patch module, the update can be applied without rebooting the system. No additional mitigation steps are indicated beyond applying the official patch.

Description

Red Hat has issued a security advisory for the kpatch-patch module in Red Hat Enterprise Linux 9.4 addressing multiple kernel vulnerabilities. These include a local privilege escalation vulnerability (CVE-2026-46300) related to a variant of the Dirty Frag vulnerability in the ESP/XFRM subsystem, and a vulnerability allowing unprivileged users to read root-owned files (CVE-2026-46333). The advisory rates the update as Important and provides patches to remediate these issues. The kpatch-patch module is a kernel live patch module that modifies running kernel code to apply fixes without rebooting.

References

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