CVE-2025-38665

MEDIUM EPSS 3.4%
Published Aug 22, 202510mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 22, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

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.

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
3.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥2.6.31  –  <6.1.148
linuxlinux_kernel*≥6.2  –  <6.6.101
linuxlinux_kernel*≥6.7  –  <6.12.41
linuxlinux_kernel*≥6.13  –  <6.15.9
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
debiandebian_linux11.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894
    Patch