CVE-2025-71182

MEDIUM EPSS 5.2%
Published Jan 31, 20265mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 31, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥5.4.1  –  <5.10.248
linuxlinux_kernel*≥5.11  –  <5.15.198
linuxlinux_kernel*≥5.16  –  <6.1.161
linuxlinux_kernel*≥6.2  –  <6.6.121
linuxlinux_kernel*≥6.7  –  <6.12.66
linuxlinux_kernel*≥6.13  –  <6.18.6
linuxlinux_kernel5.4any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a
    Patch