{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2023-52492","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-20T12:30:33.304Z","datePublished":"2024-02-29T15:52:10.499Z","dateUpdated":"2026-05-11T19:28:23.034Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:28:23.034Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix NULL pointer in channel unregistration function\n\n__dma_async_device_channel_register() can fail. In case of failure,\nchan->local is freed (with free_percpu()), and chan->local is nullified.\nWhen dma_async_device_unregister() is called (because of managed API or\nintentionally by DMA controller driver), channels are unconditionally\nunregistered, leading to this NULL pointer:\n[    1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0\n[...]\n[    1.484499] Call trace:\n[    1.486930]  device_del+0x40/0x394\n[    1.490314]  device_unregister+0x20/0x7c\n[    1.494220]  __dma_async_device_channel_unregister+0x68/0xc0\n\nLook at dma_async_device_register() function error path, channel device\nunregistration is done only if chan->local is not NULL.\n\nThen add the same condition at the beginning of\n__dma_async_device_channel_unregister() function, to avoid NULL pointer\nissue whatever the API used to reach this function."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/dma/dmaengine.c"],"versions":[{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"9de69732dde4e443c1c7f89acbbed2c45a6a8e17","status":"affected","versionType":"git"},{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"047fce470412ab64cb7345f9ff5d06919078ad79","status":"affected","versionType":"git"},{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"2ab32986a0b9e329eb7f8f04dd57cc127f797c08","status":"affected","versionType":"git"},{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b","status":"affected","versionType":"git"},{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"9263fd2a63487c6d04cbb7b74a48fb12e1e352d0","status":"affected","versionType":"git"},{"version":"d2fb0a0438384fee08a418025f743913020033ce","lessThan":"f5c24d94512f1b288262beda4d3dcb9629222fc7","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/dma/dmaengine.c"],"versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","status":"unaffected","versionType":"semver"},{"version":"5.10.210","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.149","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.76","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.15","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.3","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","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":"5.6","versionEndExcluding":"5.10.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17"},{"url":"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79"},{"url":"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08"},{"url":"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b"},{"url":"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0"},{"url":"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7"}],"title":"dmaengine: fix NULL pointer in channel unregistration function","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-476","lang":"en","description":"CWE-476 NULL Pointer Dereference"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.4,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"HIGH","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-03-11T18:32:39.400118Z","id":"CVE-2023-52492","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":"2024-11-06T19:02:52.592Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T23:03:19.973Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","tags":["x_transferred"]}]}]},"dataVersion":"5.2"}