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CVE-2026-43503VulnerabilityPublished Updated

Red Hat Security Advisory: kpatch-patch-5_14_0-570_17_1, kpatch-patch-5_14_0-570_39_1, kpatch-patch-5_14_0-570_66_1

Affects Red HatSource 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 4 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 kpatch live patch modules that address these vulnerabilities for kernel-5.14.0-570.17.1.el9_6 in Red Hat Enterprise Linux 9.6 Extended Update Support. Users should apply the provided kpatch updates as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate these issues. Since this is a live patch, it can be applied without rebooting the system. No additional mitigation steps are indicated by the vendor advisory.

Description

This advisory addresses security vulnerabilities in the Linux kernel for Red Hat Enterprise Linux 9.6 Extended Update Support. It includes a live patch module for kernel-5.14.0-570.17.1.el9_6 that fixes two key issues: a local privilege escalation vulnerability (CVE-2026-46300) related to a variant of the Dirty Frag vulnerability in ESP/XFRM, and a vulnerability allowing unprivileged users to read root-owned files (CVE-2026-46333). The patch is distributed as a kpatch live patch module, enabling modification of running kernel code without reboot. Public exploit code exists for these vulnerabilities via Metasploit. The update is rated as important by Red Hat and addresses critical kernel security flaws.

References

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