{"id":"CVE-2022-49863","state":"PUBLISHED","title":"can: af_can: fix NULL pointer dereference in can_rx_register()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: af_can: fix NULL pointer dereference in can_rx_register()\n\nIt causes NULL pointer dereference when testing as following:\n(a) use syscall(__NR_socket, 0x10ul, 3ul, 0) to create netlink socket.\n(b) use syscall(__NR_sendmsg, ...) to create bond link device and vxcan\n    link device, and bind vxcan device to bond device (can also use\n    ifenslave command to bind vxcan device to bond device).\n(c) use syscall(__NR_socket, 0x1dul, 3ul, 1) to create CAN socket.\n(d) use syscall(__NR_bind, ...) to bind the bond device to CAN socket.\n\nThe bond device invokes the can-raw protocol registration interface to\nreceive CAN packets. However, ml_priv is not allocated to the dev,\ndev_rcv_lists is assigned to NULL in can_rx_register(). In this case,\nit will occur the NULL pointer dereference issue.\n\nThe following is the stack information:\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nPGD 122a4067 P4D 122a4067 PUD 1223c067 PMD 0\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:can_rx_register+0x12d/0x1e0\nCall Trace:\n<TASK>\nraw_enable_filters+0x8d/0x120\nraw_enable_allfilters+0x3b/0x130\nraw_bind+0x118/0x4f0\n__sys_bind+0x163/0x1a0\n__x64_sys_bind+0x1e/0x30\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n</TASK>","publishedAt":"2025-05-01T14:10:16.403Z","updatedAt":"2026-05-23T15:23:04.788Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ac1feff6ea6495cbfd336f4438a6c6d140544a6","status":"affected","lessThan":"afab4655750fcb3fca359bc7d7214e3d634cdf9c","versionType":"git"},{"version":"1a5751d58b14195f763b8c1d9ef33fb8a93e95e7","status":"affected","lessThan":"d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"261178a1c2623077d62e374a75c195e6c99a6f05","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"a8055677b054bc2bb78beb1080fdc2dc5158c2fe","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"8aa59e355949442c408408c2d836e561794c40a1","versionType":"git"},{"version":"96340078d50a54f6a1252c62596bc44321c8bff9","status":"affected","versionType":"git"},{"version":"5.4.110","status":"affected","lessThan":"5.4.225","versionType":"semver"},{"version":"5.10.28","status":"affected","lessThan":"5.10.155","versionType":"semver"},{"version":"5.11.12","status":"affected","lessThan":"5.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/af_can.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.4.225","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.155","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.79","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.9","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/af_can.c"]}],"references":["https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c","https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6","https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05","https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe","https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49863.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49863","state":"PUBLISHED","datePublished":"2025-05-01T14:10:16.403Z","dateUpdated":"2026-05-23T15:23:04.788Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-01T14:05:17.236Z"},"containers":{"cna":{"title":"can: af_can: fix NULL pointer dereference in can_rx_register()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: af_can: fix NULL pointer dereference in can_rx_register()\n\nIt causes NULL pointer dereference when testing as following:\n(a) use syscall(__NR_socket, 0x10ul, 3ul, 0) to create netlink socket.\n(b) use syscall(__NR_sendmsg, ...) to create bond link device and vxcan\n    link device, and bind vxcan device to bond device (can also use\n    ifenslave command to bind vxcan device to bond device).\n(c) use syscall(__NR_socket, 0x1dul, 3ul, 1) to create CAN socket.\n(d) use syscall(__NR_bind, ...) to bind the bond device to CAN socket.\n\nThe bond device invokes the can-raw protocol registration interface to\nreceive CAN packets. However, ml_priv is not allocated to the dev,\ndev_rcv_lists is assigned to NULL in can_rx_register(). In this case,\nit will occur the NULL pointer dereference issue.\n\nThe following is the stack information:\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nPGD 122a4067 P4D 122a4067 PUD 1223c067 PMD 0\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:can_rx_register+0x12d/0x1e0\nCall Trace:\n<TASK>\nraw_enable_filters+0x8d/0x120\nraw_enable_allfilters+0x3b/0x130\nraw_bind+0x118/0x4f0\n__sys_bind+0x163/0x1a0\n__x64_sys_bind+0x1e/0x30\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n</TASK>"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4ac1feff6ea6495cbfd336f4438a6c6d140544a6","status":"affected","lessThan":"afab4655750fcb3fca359bc7d7214e3d634cdf9c","versionType":"git"},{"version":"1a5751d58b14195f763b8c1d9ef33fb8a93e95e7","status":"affected","lessThan":"d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"261178a1c2623077d62e374a75c195e6c99a6f05","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"a8055677b054bc2bb78beb1080fdc2dc5158c2fe","versionType":"git"},{"version":"4e096a18867a5a989b510f6999d9c6b6622e8f7b","status":"affected","lessThan":"8aa59e355949442c408408c2d836e561794c40a1","versionType":"git"},{"version":"96340078d50a54f6a1252c62596bc44321c8bff9","status":"affected","versionType":"git"},{"version":"5.4.110","status":"affected","lessThan":"5.4.225","versionType":"semver"},{"version":"5.10.28","status":"affected","lessThan":"5.10.155","versionType":"semver"},{"version":"5.11.12","status":"affected","lessThan":"5.12","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/af_can.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.4.225","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.155","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.79","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.9","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/af_can.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c"},{"url":"https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6"},{"url":"https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05"},{"url":"https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe"},{"url":"https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:23:04.788Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.110","versionEndExcluding":"5.4.225"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.28","versionEndExcluding":"5.10.155"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.0.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-10-01T16:11:25.503445Z","id":"CVE-2022-49863","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","type":"CWE","lang":"en","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T16:11:28.153Z"}}]}}}