{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-54020", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:53:46.179Z", "datePublished": "2025-12-24T10:55:50.583Z", "dateUpdated": "2025-12-24T10:55:50.583Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-24T10:55:50.583Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: pdma_desc memory leak fix\n\nCommit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread support for a\nDMA channel\") changed sf_pdma_prep_dma_memcpy() to unconditionally\nallocate a new sf_pdma_desc each time it is called.\n\nThe driver previously recycled descs, by checking the in_use flag, only\nallocating additional descs if the existing one was in use. This logic\nwas removed in commit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread\nsupport for a DMA channel\"), but sf_pdma_free_desc() was not changed to\nhandle the new behaviour.\n\nAs a result, each time sf_pdma_prep_dma_memcpy() is called, the previous\ndescriptor is leaked, over time leading to memory starvation:\n\n unreferenced object 0xffffffe008447300 (size 192):\n comm \"irq/39-mchp_dsc\", pid 343, jiffies 4294906910 (age 981.200s)\n hex dump (first 32 bytes):\n 00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00 ................\n 00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00 ..p.............\n backtrace:\n [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28\n [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178\n [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112\n\nAdd the missing kfree() to sf_pdma_free_desc(), and remove the redundant\nin_use flag."}], "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", "drivers/dma/sf-pdma/sf-pdma.h"], "versions": [{"version": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac", "lessThan": "ad222c9af25e3f074c180e389b3477dce42afc4f", "status": "affected", "versionType": "git"}, {"version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc", "lessThan": "03fece43fa109beba7cc9948c02f5e2d1205d607", "status": "affected", "versionType": "git"}, {"version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc", "lessThan": "8bd5040bd43f2b5ba3c898b09a3197a0c7ace126", "status": "affected", "versionType": "git"}, {"version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc", "lessThan": "b02e07015a5ac7bbc029da931ae17914b8ae0339", "status": "affected", "versionType": "git"}, {"version": "b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11", "status": "affected", "versionType": "git"}, {"version": "4c7350b1dd8a192af844de32fc99b9e34c876fda", "status": "affected", "versionType": "git"}, {"version": "a93b3f1e11971a91b6441b6d47488f4492cc113f", "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", "drivers/dma/sf-pdma/sf-pdma.h"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.99", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.16", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.3", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "5.15.61", "versionEndExcluding": "5.15.99"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.137"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ad222c9af25e3f074c180e389b3477dce42afc4f"}, {"url": "https://git.kernel.org/stable/c/03fece43fa109beba7cc9948c02f5e2d1205d607"}, {"url": "https://git.kernel.org/stable/c/8bd5040bd43f2b5ba3c898b09a3197a0c7ace126"}, {"url": "https://git.kernel.org/stable/c/b02e07015a5ac7bbc029da931ae17914b8ae0339"}], "title": "dmaengine: sf-pdma: pdma_desc memory leak fix", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: pdma_desc memory leak fix\n\nCommit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread support for a\nDMA channel\") changed sf_pdma_prep_dma_memcpy() to unconditionally\nallocate a new sf_pdma_desc each time it is called.\n\nThe driver previously recycled descs, by checking the in_use flag, only\nallocating additional descs if the existing one was in use. This logic\nwas removed in commit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread\nsupport for a DMA channel\"), but sf_pdma_free_desc() was not changed to\nhandle the new behaviour.\n\nAs a result, each time sf_pdma_prep_dma_memcpy() is called, the previous\ndescriptor is leaked, over time leading to memory starvation:\n\n unreferenced object 0xffffffe008447300 (size 192):\n comm \"irq/39-mchp_dsc\", pid 343, jiffies 4294906910 (age 981.200s)\n hex dump (first 32 bytes):\n 00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00 ................\n 00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00 ..p.............\n backtrace:\n [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28\n [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178\n [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112\n\nAdd the missing kfree() to sf_pdma_free_desc(), and remove the redundant\nin_use flag."}], "id": "CVE-2023-54020", "lastModified": "2025-12-24T11:15:55.003", "metrics": {}, "published": "2025-12-24T11:15:55.003", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03fece43fa109beba7cc9948c02f5e2d1205d607"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bd5040bd43f2b5ba3c898b09a3197a0c7ace126"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad222c9af25e3f074c180e389b3477dce42afc4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b02e07015a5ac7bbc029da931ae17914b8ae0339"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}