{
    "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": "2026-05-23T15:31:58.250Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:31:58.250Z"
            },
            "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"
                        },
                        {
                            "version": "5.15.61",
                            "lessThan": "5.15.99",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.137",
                            "lessThan": "5.11",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.18.18",
                            "lessThan": "5.19",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.2",
                            "lessThan": "5.20",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "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"
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        }
    }
}