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CVE-2026-43499VulnerabilityPublished Updated

Red Hat Security Advisory: kernel security update

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 6 Nov 2026, 02:32 UTC

Severity
High

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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Jul 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 5 Nov 2026.

What to do

AI-suggested

Red Hat has released an official security update for the affected kernel packages in Red Hat Enterprise Linux 6 Extended Lifecycle Support. Users should apply the update as described in the Red Hat advisory and reboot their systems to ensure the fix takes effect. This is the recommended and effective mitigation.

Description

A security update for the Linux kernel in Red Hat Enterprise Linux 6 Extended Lifecycle Support addresses a vulnerability identified as CVE-2026-43499. The flaw involves the rtmutex component where the function remove_waiter() improperly uses the current task instead of waiter::task. This update is rated as important by Red Hat and requires a system reboot to take effect.

References

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