CVE-2022-49863 (GCVE-0-2022-49863)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2025-10-01 16:11
VLAI?
Title
can: af_can: fix NULL pointer dereference in can_rx_register()
Summary
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>
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4ac1feff6ea6495cbfd336f4438a6c6d140544a6 , < afab4655750fcb3fca359bc7d7214e3d634cdf9c (git)
Affected: 1a5751d58b14195f763b8c1d9ef33fb8a93e95e7 , < d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6 (git)
Affected: 4e096a18867a5a989b510f6999d9c6b6622e8f7b , < 261178a1c2623077d62e374a75c195e6c99a6f05 (git)
Affected: 4e096a18867a5a989b510f6999d9c6b6622e8f7b , < a8055677b054bc2bb78beb1080fdc2dc5158c2fe (git)
Affected: 4e096a18867a5a989b510f6999d9c6b6622e8f7b , < 8aa59e355949442c408408c2d836e561794c40a1 (git)
Affected: 96340078d50a54f6a1252c62596bc44321c8bff9 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.4.225 , ≤ 5.4.* (semver)
Unaffected: 5.10.155 , ≤ 5.10.* (semver)
Unaffected: 5.15.79 , ≤ 5.15.* (semver)
Unaffected: 6.0.9 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.