CVE-2022-50145

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50145", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.424Z", "datePublished": "2025-06-18T11:03:06.312Z", "dateUpdated": "2026-08-05T08:57:32.722Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:57:32.722Z"}, "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in the SiFive/platform sf-pdma dmaengine driver and is reached only through local DMA channel operations (dmatest/sysfs or in-kernel DMA_MEMCPY clients such as async_tx), not via network packets or adjacent-link protocols.\nAC:L - The attacker can create the race by issuing concurrent transfers on the same channel (e.g. multiple dmatest threads or parallel async_tx/RAID memcpy submissions); both sides of the race are attacker-influenced, so success does not depend on conditions outside attacker control.\nPR:L - sf-pdma registers public DMA_MEMCPY channels (no DMA_PRIVATE), which async_tx and similar clients can share; concurrent I/O from an unprivileged local user can therefore hit the race without real root, so PR:L is the higher-severity defensible choice.\nUI:N - Exploitation requires only attacker-controlled concurrent DMA submissions; no separate victim action (mount, open, or admin confirmation) is needed.\nS:U - Impact is kernel descriptor UAF/corruption and DoS within the host kernel authority; it is not a VM escape or IOMMU boundary bypass.\nC:H - The race uses a descriptor that is freed or substituted for another transfer (commit: freed/substituted chan->desc), yielding a use-after-free/list-corruption primitive that can be leveraged for arbitrary kernel memory disclosure.\nI:H - Descriptor substitution/UAF enables wrong DMA address programming and heap reuse/control-flow hijacking primitives typical of kernel use-after-free exploitation, so integrity impact is High.\nA:H - The bug causes a documented kernel NULL-pointer oops in vchan_find_desc/sf_pdma_tx_status and can hang the system under multi-threaded DMA load."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/sf-pdma/sf-pdma.c"], "versions": [{"version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "lessThan": "b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11", "status": "affected", "versionType": "git"}, {"version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "lessThan": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac", "status": "affected", "versionType": "git"}, {"version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "lessThan": "4c7350b1dd8a192af844de32fc99b9e34c876fda", "status": "affected", "versionType": "git"}, {"version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "lessThan": "a93b3f1e11971a91b6441b6d47488f4492cc113f", "status": "affected", "versionType": "git"}, {"version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "lessThan": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc", "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/sf-pdma/sf-pdma.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.137", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "5.5", "versionEndExcluding": "5.10.137"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.61"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.19.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.0"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/dma/sf-pdma/sf-pdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11", "status": "affected", "version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "versionType": "git"}, {"lessThan": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac", "status": "affected", "version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "versionType": "git"}, {"lessThan": "4c7350b1dd8a192af844de32fc99b9e34c876fda", "status": "affected", "version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "versionType": "git"}, {"lessThan": "a93b3f1e11971a91b6441b6d47488f4492cc113f", "status": "affected", "version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "versionType": "git"}, {"lessThan": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc", "status": "affected", "version": "6973886ad58e6b4988813331abb76ae0b364a9c2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/dma/sf-pdma/sf-pdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.137", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.61", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.18", "versionType": "semver"}, {"lessThanOrEqual": "5.19.*", "status": "unaffected", "version": "5.19.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4", "versionEndExcluding": "5.10.137", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618", "versionEndExcluding": "5.15.61", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11", "versionEndExcluding": "5.18.18", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F", "versionEndExcluding": "5.19.2", "versionStartIncluding": "5.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dmaengine: sf-pdma: Agregar soporte multihilo para un canal DMA Cuando obtenemos un canal DMA e intentamos usarlo en m\u00faltiples subprocesos, provocar\u00e1 errores y colgar\u00e1 el sistema. % echo 64 > /sys/module/dmatest/parameters/threads_per_chan % echo 10000 > /sys/module/dmatest/parameters/iterations % echo 1 > /sys/module/dmatest/parameters/run [ 89.480664] No se puede manejar la desreferencia del puntero NULL del n\u00facleo en la direcci\u00f3n virtual 00000000000000a0 [ 89.488725] Ups [#1] [ 89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 No contaminado 5.17.0-rc5 [ 89.509385] epc : vchan_find_desc+0x32/0x46 [ 89.513553] ra : sf_pdma_tx_status+0xca/0xd6 Esto ocurre debido a la ejecuci\u00f3n de datos. Cada hilo reescribe el descriptor del canal en cuanto se llama a device_prep_dma_memcpy(). Esto provoca que el controlador crea que est\u00e1 usando el descriptor correcto, pero en realidad se libera o sustituye a otro. Con las correcciones actuales, un descriptor cambia su valor solo cuando se ha usado. Se obtiene un nuevo descriptor de la cola vc->desc_issued, que ya contiene descriptores listos para enviarse. Los hilos no tienen acceso directo al descriptor del canal DMA. Ahora solo es posible poner en cola un descriptor para su posterior procesamiento."}], "id": "CVE-2022-50145", "lastModified": "2026-08-04T10:18:06.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-06-18T11:15:44.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4c7350b1dd8a192af844de32fc99b9e34c876fda"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5ab2782c944e324008ef5d658f2494a9f0e3c5ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a93b3f1e11971a91b6441b6d47488f4492cc113f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: dmaengine: sf-pdma: Add multithread support for a DMA channel", "id": "2373418", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373418"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndmaengine: sf-pdma: Add multithread support for a DMA channel\nWhen we get a DMA channel and try to use it in multiple threads it\nwill cause oops and hanging the system.\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\naddress 00000000000000a0\n[ 89.488725] Oops [#1]\n[ 89.494708] CPU: 2 PID: 1008 Comm: dma0chan0-copy0 Not tainted\n5.17.0-rc5\n[ 89.509385] epc : vchan_find_desc+0x32/0x46\n[ 89.513553] ra : sf_pdma_tx_status+0xca/0xd6\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.\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."], "name": "CVE-2022-50145", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50145\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50145\nhttps://lore.kernel.org/linux-cve-announce/2025061820-CVE-2022-50145-b120@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:45:29.588510+00:00", "updated": "2025-06-23T08:45:29.588575+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}