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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-38665

can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_modeCVE-2025-38665

Answer in brief

CVE-2025-38665 records a Unknown severity vulnerability in can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 22, 2025Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 5, 2026
References
6 linked sources
Open source record

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=39549eef3587f1c1e8c65c88a2400d10fd30ea17 <6bbcf37c5114926c99a1d1e6993a5b35689d2599 || >=39549eef3587f1c1e8c65c88a2400d10fd30ea17 <cf81a60a973358dea163f6b14062f17831ceb894 || >=39549eef3587f1c1e8c65c88a2400d10fd30ea17 <0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5 || >=39549eef3587f1c1e8c65c88a2400d10fd30ea17 <6acceb46180f9e160d4f0c56fcaf39ba562822ae || >=39549eef3587f1c1e8c65c88a2400d10fd30ea17 <c1f3f9797c1f44a762e6f5f72520b2e520537b526bbcf37c5114926c99a1d1e6993a5b35689d2599, cf81a60a973358dea163f6b14062f17831ceb894, 0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5, 6acceb46180f9e160d4f0c56fcaf39ba562822ae, c1f3f9797c1f44a762e6f5f72520b2e520537b52
Linux/Linuxgeneric2.6.31Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 6bbcf37c5114926c99a1d1e6993a5b35689d2599 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 22, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencelists.debian.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode Andrei Lalaev reported a NULL pointer deref when a CAN device is restarted from Bus Off and the driver does not implement the struct can_priv::do_set_mode callback. There are 2 code path that call struct can_priv::do_set_mode: - directly by a manual restart from the user space, via can_changelink() - delayed automatic restart after bus off (deactivated by default) To prevent the NULL pointer deference, refuse a manual restart or configure the automatic restart delay in can_changelink() and report the error via extack to user space. As an additional safety measure let can_restart() return an error if can_priv::do_set_mode is not set instead of dereferencing it unchecked.

Quoted source text, attributed separately from HOL analysis.