Skip to main content
VulnerabilityPublished Updated

CVE-2025-39980: Linux kernel · nexthop: Forbid FDB status change while nexthop is in a group

Affects Linux kernelSource CVE Database V5

0
Compare

Not known to be exploited · fixed in f0e49fd13afe9dea7a09a1c9537fd00cea22badb : patch Linux kernel soon.

Data as of 10 Nov 2026, 15:03 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in f0e49fd13afe9dea7a09a1c9537fd00cea22badb, ec428fff792b7bd15b248dafca2e654b666b1304, e1e87ac0daacd51f522ecd1645cd76b5809303ed +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Oct 2025

  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 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < f0e49fd13afe9dea7a09a1c9537fd00cea22badb
Fixed in
  • f0e49fd13afe9dea7a09a1c9537fd00cea22badb
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < ec428fff792b7bd15b248dafca2e654b666b1304
Fixed in
  • ec428fff792b7bd15b248dafca2e654b666b1304
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < e1e87ac0daacd51f522ecd1645cd76b5809303ed
Fixed in
  • e1e87ac0daacd51f522ecd1645cd76b5809303ed
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < 24046d31f6f92220852d393d510b6062843e3fbd
Fixed in
  • 24046d31f6f92220852d393d510b6062843e3fbd
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < 390b3a300d7872cef9588f003b204398be69ce08
Fixed in
  • 390b3a300d7872cef9588f003b204398be69ce08
LinuxLinuxAffected
  • ≥ 38428d68719c454d269cb03b776d8a4b0ad66111, < 8dd4aa0122885f710930de135af2adc4ccc3238f
Fixed in
  • 8dd4aa0122885f710930de135af2adc4ccc3238f

AI-suggested

A fix has been implemented in the Linux kernel to prevent changing the FDB status of a nexthop while it is part of a group. Users should update to a fixed kernel version containing the patches identified by the commit hashes provided. No other mitigation is indicated or required.

Description

A vulnerability in the Linux kernel's nexthop subsystem allowed changing the FDB (Forwarding Database) status of a nexthop while it was part of a group, leading to invalid configurations. This could cause a kernel NULL pointer dereference and system crash (NPD). The issue has been fixed by forbidding FDB status changes on nexthops that are in a group.

References

Community reviews

Loading reviews…