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CVE-2025-40248VulnerabilityPublished Updated

Red Hat Security Advisory: kpatch-patch-5_14_0-427_100_1, kpatch-patch-5_14_0-427_44_1, kpatch-patch-5_14_0-427_55_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 (kpatch) for kernel-5.14.0-427.44.1.el9_4 to address this vulnerability. Applying these patches and rebooting the system is required to remediate the issue. Users should follow Red Hat's update instructions at https://access.redhat.com/articles/11258 to apply the update. No additional mitigation steps are indicated by the vendor.

Description

A security vulnerability identified as CVE-2025-40248 affects the Linux kernel's vsock component in Red Hat Enterprise Linux 9.4 Extended Update Support. This vulnerability may lead to memory corruption. Red Hat has released kernel live patch modules for kernel version 5.14.0-427.44.1.el9_4 to address this issue. The update requires a system reboot to take effect. The vulnerability is rated as having an important security impact by Red Hat Product Security.

References

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