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CVE-2026-43503VulnerabilityPublished Updated

Red Hat Security Advisory: kernel security update

Affects Linux kernelSource GCVE Database

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Mentioned vulnerabilities

Public exploit available (Metasploit).

Data as of 30 Oct 2026, 02:47 UTC

Severity
High

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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 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 official kernel updates that address these vulnerabilities. Users should apply the provided kernel updates for Red Hat Enterprise Linux 8 and related products as detailed in the Red Hat advisory RHSA-2026:19666. A system reboot is required for the updates to take effect. No additional mitigation steps are indicated by the vendor.

Description

Red Hat has issued a security advisory for a kernel update addressing multiple vulnerabilities in the Linux kernel. The update fixes 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 update is rated as Important by Red Hat and requires a system reboot to take effect.

References

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