{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47231","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-04-10T18:59:19.530Z","datePublished":"2024-05-21T14:19:34.413Z","dateUpdated":"2025-05-04T07:06:47.527Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:06:47.527Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcba_usb: fix memory leak in mcba_usb\n\nSyzbot reported memory leak in SocketCAN driver for Microchip CAN BUS\nAnalyzer Tool. The problem was in unfreed usb_coherent.\n\nIn mcba_usb_start() 20 coherent buffers are allocated and there is\nnothing, that frees them:\n\n1) In callback function the urb is resubmitted and that's all\n2) In disconnect function urbs are simply killed, but URB_FREE_BUFFER\n   is not set (see mcba_usb_start) and this flag cannot be used with\n   coherent buffers.\n\nFail log:\n| [ 1354.053291][ T8413] mcba_usb 1-1:0.0 can0: device disconnected\n| [ 1367.059384][ T8420] kmemleak: 20 new suspected memory leaks (see /sys/kernel/debug/kmem)\n\nSo, all allocated buffers should be freed with usb_free_coherent()\nexplicitly\n\nNOTE:\nThe same pattern for allocating and freeing coherent buffers\nis used in drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/mcba_usb.c"],"versions":[{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"89df95ce32be204eef2e7d4b2f6fb552fb191a68","status":"affected","versionType":"git"},{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"a115198caaab6d663bef75823a3c5f0802306d60","status":"affected","versionType":"git"},{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"6f87c0e21ad20dd3d22108e33db1c552dfa352a0","status":"affected","versionType":"git"},{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"6bd3d80d1f019cefa7011056c54b323f1d8b8e83","status":"affected","versionType":"git"},{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"d0760a4ef85697bc756d06eae17ae27f3f055401","status":"affected","versionType":"git"},{"version":"51f3baad7de943780ce0c17bd7975df567dd6e14","lessThan":"91c02557174be7f72e46ed7311e3bea1939840b0","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/mcba_usb.c"],"versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","status":"unaffected","versionType":"semver"},{"version":"4.14.238","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.196","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.128","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.46","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.12.13","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.12.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/89df95ce32be204eef2e7d4b2f6fb552fb191a68"},{"url":"https://git.kernel.org/stable/c/a115198caaab6d663bef75823a3c5f0802306d60"},{"url":"https://git.kernel.org/stable/c/6f87c0e21ad20dd3d22108e33db1c552dfa352a0"},{"url":"https://git.kernel.org/stable/c/6bd3d80d1f019cefa7011056c54b323f1d8b8e83"},{"url":"https://git.kernel.org/stable/c/d0760a4ef85697bc756d06eae17ae27f3f055401"},{"url":"https://git.kernel.org/stable/c/91c02557174be7f72e46ed7311e3bea1939840b0"}],"title":"can: mcba_usb: fix memory leak in mcba_usb","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:32:07.366Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/89df95ce32be204eef2e7d4b2f6fb552fb191a68","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/a115198caaab6d663bef75823a3c5f0802306d60","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6f87c0e21ad20dd3d22108e33db1c552dfa352a0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6bd3d80d1f019cefa7011056c54b323f1d8b8e83","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/d0760a4ef85697bc756d06eae17ae27f3f055401","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/91c02557174be7f72e46ed7311e3bea1939840b0","tags":["x_transferred"]}]},{"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"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":"2024-05-31T18:50:07.041810Z","id":"CVE-2021-47231","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-06T19:45:06.470Z"}}]}}