{"api_version":"1","generated_at":"2026-10-27T08:42:48+00:00","cve":"CVE-2022-50145","urls":{"html":"https://cve.report/CVE-2022-50145","api":"https://cve.report/api/cve/CVE-2022-50145.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-50145","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-50145"},"summary":{"title":"dmaengine: sf-pdma: Add multithread support for a DMA channel","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: Add multithread support for a DMA channel\n\nWhen we get a DMA channel and try to use it in multiple threads it\nwill cause oops and hanging the system.\n\n% echo 64 > /sys/module/dmatest/parameters/threads_per_chan\n% echo 10000 > /sys/module/dmatest/parameters/iterations\n% echo 1 > /sys/module/dmatest/parameters/run\n[   89.480664] Unable to handle kernel NULL pointer dereference at virtual\n               address 00000000000000a0\n[   89.488725] Oops [#1]\n[   89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 Not tainted\n               5.17.0-rc5\n[   89.509385] epc : vchan_find_desc+0x32/0x46\n[   89.513553]  ra : sf_pdma_tx_status+0xca/0xd6\n\nThis happens because of data race. Each thread rewrite channels's\ndescriptor as soon as device_prep_dma_memcpy() is called. It leads to the\nsituation when the driver thinks that it uses right descriptor that\nactually is freed or substituted for other one.\n\nWith current fixes a descriptor changes its value only when it has\nbeen used. A new descriptor is acquired from vc->desc_issued queue that\nis already filled with descriptors that are ready to be sent. Threads\nhave no direct access to DMA channel descriptor. Now it is just possible\nto queue a descriptor for further processing.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-06-18 11:15:44","updated_at":"2026-08-04 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50145","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6973886ad58e6b4988813331abb76ae0b364a9c2 b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6973886ad58e6b4988813331abb76ae0b364a9c2 5ab2782c944e324008ef5d658f2494a9f0e3c5ac git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6973886ad58e6b4988813331abb76ae0b364a9c2 4c7350b1dd8a192af844de32fc99b9e34c876fda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6973886ad58e6b4988813331abb76ae0b364a9c2 a93b3f1e11971a91b6441b6d47488f4492cc113f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: Add multithread support for a DMA channel\n\nWhen we get a DMA channel and try to use it in multiple threads it\nwill cause oops and hanging the system.\n\n% echo 64 > /sys/module/dmatest/parameters/threads_per_chan\n% echo 10000 > /sys/module/dmatest/parameters/iterations\n% echo 1 > /sys/module/dmatest/parameters/run\n[   89.480664] Unable to handle kernel NULL pointer dereference at virtual\n               address 00000000000000a0\n[   89.488725] Oops [#1]\n[   89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 Not tainted\n               5.17.0-rc5\n[   89.509385] epc : vchan_find_desc+0x32/0x46\n[   89.513553]  ra : sf_pdma_tx_status+0xca/0xd6\n\nThis happens because of data race. Each thread rewrite channels's\ndescriptor as soon as device_prep_dma_memcpy() is called. It leads to the\nsituation when the driver thinks that it uses right descriptor that\nactually is freed or substituted for other one.\n\nWith current fixes a descriptor changes its value only when it has\nbeen used. A new descriptor is acquired from vc->desc_issued queue that\nis already filled with descriptors that are ready to be sent. Threads\nhave no direct access to DMA channel descriptor. Now it is just possible\nto queue a descriptor for further processing."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-08-04T09:07:50.615Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11"},{"url":"https://git.kernel.org/stable/c/5ab2782c944e324008ef5d658f2494a9f0e3c5ac"},{"url":"https://git.kernel.org/stable/c/4c7350b1dd8a192af844de32fc99b9e34c876fda"},{"url":"https://git.kernel.org/stable/c/a93b3f1e11971a91b6441b6d47488f4492cc113f"},{"url":"https://git.kernel.org/stable/c/b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc"}],"title":"dmaengine: sf-pdma: Add multithread support for a DMA channel","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-50145","datePublished":"2025-06-18T11:03:06.312Z","dateReserved":"2025-06-18T10:57:27.424Z","dateUpdated":"2026-08-04T09:07:50.615Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-06-18 11:15:44","lastModifiedDate":"2026-08-04 10:18:06","problem_types":["CWE-476"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.137","matchCriteriaId":"C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.61","matchCriteriaId":"51861563-7F40-460F-82CD-2D3FBDAD6618"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.18.18","matchCriteriaId":"5B42E453-8837-49D0-A5EF-03F818A6DC11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"5.19.2","matchCriteriaId":"A1A2A5A5-4598-4D7E-BA07-4660398D6C8F"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"50145","Ordinal":"1","Title":"dmaengine: sf-pdma: Add multithread support for a DMA channel","CVE":"CVE-2022-50145","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"50145","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: Add multithread support for a DMA channel\n\nWhen we get a DMA channel and try to use it in multiple threads it\nwill cause oops and hanging the system.\n\n% echo 64 > /sys/module/dmatest/parameters/threads_per_chan\n% echo 10000 > /sys/module/dmatest/parameters/iterations\n% echo 1 > /sys/module/dmatest/parameters/run\n[   89.480664] Unable to handle kernel NULL pointer dereference at virtual\n               address 00000000000000a0\n[   89.488725] Oops [#1]\n[   89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 Not tainted\n               5.17.0-rc5\n[   89.509385] epc : vchan_find_desc+0x32/0x46\n[   89.513553]  ra : sf_pdma_tx_status+0xca/0xd6\n\nThis happens because of data race. Each thread rewrite channels's\ndescriptor as soon as device_prep_dma_memcpy() is called. It leads to the\nsituation when the driver thinks that it uses right descriptor that\nactually is freed or substituted for other one.\n\nWith current fixes a descriptor changes its value only when it has\nbeen used. A new descriptor is acquired from vc->desc_issued queue that\nis already filled with descriptors that are ready to be sent. Threads\nhave no direct access to DMA channel descriptor. Now it is just possible\nto queue a descriptor for further processing.","Type":"Description","Title":"dmaengine: sf-pdma: Add multithread support for a DMA channel"}]}}}