CVE-2022-49863

MEDIUM EPSS 5.5%
Published May 1, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 1, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: can: af_can: fix NULL pointer dereference in can_rx_register() It causes NULL pointer dereference when testing as following: (a) use syscall(__NR_socket, 0x10ul, 3ul, 0) to create netlink socket. (b) use syscall(__NR_sendmsg, ...) to create bond link device and vxcan link device, and bind vxcan device to bond device (can also use ifenslave command to bind vxcan device to bond device). (c) use syscall(__NR_socket, 0x1dul, 3ul, 1) to create CAN socket. (d) use syscall(__NR_bind, ...) to bind the bond device to CAN socket. The bond device invokes the can-raw protocol registration interface to receive CAN packets. However, ml_priv is not allocated to the dev, dev_rcv_lists is assigned to NULL in can_rx_register(). In this case, it will occur the NULL pointer dereference issue. The following is the stack information: BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 122a4067 P4D 122a4067 PUD 1223c067 PMD 0 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:can_rx_register+0x12d/0x1e0 Call Trace: <TASK> raw_enable_filters+0x8d/0x120 raw_enable_allfilters+0x3b/0x130 raw_bind+0x118/0x4f0 __sys_bind+0x163/0x1a0 __x64_sys_bind+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>

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
5.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.4.110  –  <5.4.225
linuxlinux_kernel*≥5.10.28  –  <5.10.155
linuxlinux_kernel*≥5.11.12  –  <5.15.79
linuxlinux_kernel*≥5.16  –  <6.0.9
linuxlinux_kernel6.9any
linuxlinux_kernel6.9any
linuxlinux_kernel6.9any
linuxlinux_kernel6.9any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6
    Patch