{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53171",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-09-15T13:59:19.064Z",
        "datePublished": "2025-09-15T14:04:04.544Z",
        "dateUpdated": "2026-05-11T19:39:38.716Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:39:38.716Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/type1: prevent underflow of locked_vm via exec()\n\nWhen a vfio container is preserved across exec, the task does not change,\nbut it gets a new mm with locked_vm=0, and loses the count from existing\ndma mappings.  If the user later unmaps a dma mapping, locked_vm underflows\nto a large unsigned value, and a subsequent dma map request fails with\nENOMEM in __account_locked_vm.\n\nTo avoid underflow, grab and save the mm at the time a dma is mapped.\nUse that mm when adjusting locked_vm, rather than re-acquiring the saved\ntask's mm, which may have changed.  If the saved mm is dead, do nothing.\n\nlocked_vm is incremented for existing mappings in a subsequent patch."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/vfio/vfio_iommu_type1.c"
                    ],
                    "versions": [
                        {
                            "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
                            "lessThan": "5a271242716846cc016736fb76be2b40ee49b0c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
                            "lessThan": "eafb81c50da899dd80b340c841277acc4a1945b7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
                            "lessThan": "a6b2aabe664098d5cf877ae0fd96459464a30e17",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
                            "lessThan": "b0790dff0760b7734cf0961f497ad64628ca550b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73fa0d10d077d9521ee2dace2307ae2c9a965336",
                            "lessThan": "046eca5018f8a5dd1dc2cedf87fb5843b9ea3026",
                            "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/vfio/vfio_iommu_type1.c"
                    ],
                    "versions": [
                        {
                            "version": "3.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.173",
                            "lessThanOrEqual": "5.10.*",
                            "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": "3.6",
                                    "versionEndExcluding": "5.10.173"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.6",
                                    "versionEndExcluding": "5.15.99"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.6",
                                    "versionEndExcluding": "6.1.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.6",
                                    "versionEndExcluding": "6.2.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.6",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026"
                }
            ],
            "title": "vfio/type1: prevent underflow of locked_vm via exec()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}