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CVE-2025-40248VulnerabilityPublished Updated

Red Hat Security Advisory: kpatch-patch-4_18_0-553_30_1, kpatch-patch-4_18_0-553_40_1, kpatch-patch-4_18_0-553_53_1

Affects Red HatSource GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 19:20 UTC

Severity
High

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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Mar 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 official live patch modules to address this vulnerability. Users should apply the provided kpatch updates for the affected kernel versions and reboot their systems to activate the patches. Detailed instructions are available in the Red Hat advisory and knowledge base article. No additional mitigation steps are indicated beyond applying the official update and rebooting.

Description

A vulnerability identified as CVE-2025-40248 affects the Linux kernel's vsock component in Red Hat Enterprise Linux 8. This issue may lead to memory corruption. Red Hat has issued a security advisory providing live patch modules for kernel version 4.18.0-553.30.1.el8_10 and related updates. The advisory rates the security impact as Important and recommends applying the updates and rebooting the system for the patch to take effect.

References

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