CVE-2022-49863can: af_can: fix NULL pointer dereference in can_rx_register()
- 5.5MediumCVSS base score
- 0.20%Exploitation in 30 daysEPSS · top 90% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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>
Timeline
ID reserved
By Linux
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 4ac1feff6ea6495cbfd336f4438a6c6d140544a6 – < afab4655750fcb3fca359bc7d7214e3d634cdf9c
- affected 1a5751d58b14195f763b8c1d9ef33fb8a93e95e7 – < d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6
- affected 4e096a18867a5a989b510f6999d9c6b6622e8f7b – < 261178a1c2623077d62e374a75c195e6c99a6f05
- affected 4e096a18867a5a989b510f6999d9c6b6622e8f7b – < a8055677b054bc2bb78beb1080fdc2dc5158c2fe
- affected 4e096a18867a5a989b510f6999d9c6b6622e8f7b – < 8aa59e355949442c408408c2d836e561794c40a1
- affected 96340078d50a54f6a1252c62596bc44321c8bff9
- affected 5.4.110 – < 5.4.225
- affected 5.10.28 – < 5.10.155
- affected 5.11.12 – < 5.12
- affected 5.12
- unaffected < 5.12
- unaffected 5.4.225 – ≤ 5.4.*
- unaffected 5.10.155 – ≤ 5.10.*
- unaffected 5.15.79 – ≤ 5.15.*
- unaffected 6.0.9 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c (opens in a new tab)
- https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6 (opens in a new tab)
- https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05 (opens in a new tab)
- https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe (opens in a new tab)
- https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-12912 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-49863)Record last updated .