5.5

CVE-2022-49863: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2022-49863DEBIAN-CVE-2022-49863
Published 01-05-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2022-49863 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2025:01918-1SUSE-SU-2025:01966-1SUSE-SU-2025:02173-1SUSE-SU-2025:02262-1

Timeline

  1. 01-05-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

+0.01 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu109 products
  • linux< 5.4.0-144.161 | < 5.15.0-67.74
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1097.105 | < 5.15.0-1031.35
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4ac1feff6ea6495cbfd336f4438a6c6d140544a6, < afab4655750fcb3fca359bc7d7214e3d634cdf9c | ≥ 1a5751d58b14195f763b8c1d9ef33fb8a93e95e7, < d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6 | ≥ 4e096a18867a5a989b510f6999d9c6b6622e8f7b, < 261178a1c2623077d62e374a75c195e6c99a6f05 | ≥ 4e096a18867a5a989b510f6999d9c6b6622e8f7b, < a8055677b054bc2bb78beb1080fdc2dc5158c2fe | ≥ 4e096a18867a5a989b510f6999d9c6b6622e8f7b, < 8aa59e355949442c408408c2d836e561794c40a1 | 96340078d50a54f6a1252c62596bc44321c8bff9 | ≥ 5.4.110, < 5.4.225 | ≥ 5.10.28, < 5.10.155 | ≥ 5.11.12, < 5.12 | 5.12
  • linux_kernel≥ 5.4.110, < 5.4.225 | ≥ 5.10.28, < 5.10.155 | ≥ 5.11.12, < 5.15.79 | ≥ 5.16, < 6.0.9 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3 | 6.9:rc4
Debian1 product
  • linux< 6.0.10-1

3 vendors · 112 products

References

9 links