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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-71182

can: j1939: make j1939_session_activate() fail if device is no longer registeredCVE-2025-71182

Answer in brief

CVE-2025-71182 records a Unknown severity vulnerability in can: j1939: make j1939_session_activate() fail if device is no longer registered. 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 Jan 31, 2026Updated Oct 19, 2026Source checked Oct 19, 2026First seen by HOL Oct 19, 2026Material review Oct 19, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-362
Source
CVE List V5
Source checked
Oct 19, 2026
References
7 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>=9d71dd0c70099914fcd063135da3c580865e924c <ebb0dfd718dd31c8d3600612ca4b7207ec3d923a || >=9d71dd0c70099914fcd063135da3c580865e924c <c3a4316e3c746af415c0fd6c6d489ad13f53714d || >=9d71dd0c70099914fcd063135da3c580865e924c <46ca9dc978923c5e1247a9e9519240ba7ace413c || >=9d71dd0c70099914fcd063135da3c580865e924c <78d87b72cebe2a993fd5b017e9f14fb6278f2eae || >=9d71dd0c70099914fcd063135da3c580865e924c <ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536 || >=9d71dd0c70099914fcd063135da3c580865e924c <79dd3f1d9dd310c2af89b09c71f34d93973b200f || >=9d71dd0c70099914fcd063135da3c580865e924c <5d5602236f5db19e8b337a2cd87a90ace5ea776debb0dfd718dd31c8d3600612ca4b7207ec3d923a, c3a4316e3c746af415c0fd6c6d489ad13f53714d, 46ca9dc978923c5e1247a9e9519240ba7ace413c, 78d87b72cebe2a993fd5b017e9f14fb6278f2eae, ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536, 79dd3f1d9dd310c2af89b09c71f34d93973b200f, 5d5602236f5db19e8b337a2cd87a90ace5ea776d
Linux/Linuxgeneric5.4Not 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 ebb0dfd718dd31c8d3600612ca4b7207ec3d923a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jan 31, 2026

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

  2. Source modified

    Oct 19, 2026

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

  3. First seen by HOL

    Oct 19, 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 referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.

Quoted source text, attributed separately from HOL analysis.