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CVE-2025-39925VulnerabilityPublished Updated

SUSE · security update for kernel

Affects SUSESource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited : upgrade the Red Hat redhat/kernel package to 9.8 when convenient.

Data as of 26 Oct 2026, 08:30 UTC

Severity
Medium

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

EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 9.8

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade the Red Hat redhat/kernel package to 9.8.

Affected software

ProductAffectedFixed in
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threatsAffected
  • =9
  • <9.8
Fixed in
  • 9.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update is available and should be applied promptly. The update includes fixes for both CVE-2025-39925 and CVE-2025-39979. Systems must be rebooted after applying the update for the fixes to take effect. Refer to the Red Hat advisory RHSA-2025:22865 and the update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps.

Description

A security update has been released for the Linux kernel packages used in Red Hat Enterprise Linux 9 and related distributions. The update addresses two vulnerabilities: CVE-2025-39925, which implements a NETDEV_UNREGISTER notification handler in the CAN J1939 subsystem, and CVE-2025-39979, which fixes a use-after-free (UAF) vulnerability in the mlx5 network driver flow counter release. These vulnerabilities have been rated with moderate severity by Red Hat. The update requires a system reboot to take effect.

References

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