{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43220",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.994Z",
        "datePublished": "2026-05-06T11:28:20.905Z",
        "dateUpdated": "2026-05-17T15:21:38.711Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-17T15:21:38.711Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: serialize sequence allocation under concurrent TLB invalidations\n\nWith concurrent TLB invalidations, completion wait randomly gets timed out\nbecause cmd_sem_val was incremented outside the IOMMU spinlock, allowing\nCMD_COMPL_WAIT commands to be queued out of sequence and breaking the\nordering assumption in wait_on_sem().\nMove the cmd_sem_val increment under iommu->lock so completion sequence\nallocation is serialized with command queuing.\nAnd remove the unnecessary return."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iommu/amd/amd_iommu_types.h",
                        "drivers/iommu/amd/init.c",
                        "drivers/iommu/amd/iommu.c"
                    ],
                    "versions": [
                        {
                            "version": "f2f65b28d802a667119147444ec2ae33eebf9a58",
                            "lessThan": "d51bf43193b1e95dc4e34e540dc76e19def2ae5a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "715c263119fd1b918a9fcbd8a36ea5b604a46324",
                            "lessThan": "fca7aa0264ae99e5ff287d0ced5af0b82b121c4f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e15768e68820142077bbca402d8e902f64ade1b0",
                            "lessThan": "5000ce7fcb31067566a1a1a2e5b5bbff93625242",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "496269d12072ecb219826485bdbec70c92a8eef5",
                            "lessThan": "48caa7542a795c9679ec1bd1bc2592e05a7369a4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d2a0cac10597068567d336e85fa3cbdbe8ca62bf",
                            "lessThan": "9e249c48412828e807afddc21527eb734dc9bd3d",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iommu/amd/amd_iommu_types.h",
                        "drivers/iommu/amd/init.c",
                        "drivers/iommu/amd/iommu.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6.128",
                            "lessThan": "6.6.140",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThan": "6.12.88",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.128",
                                    "versionEndExcluding": "6.6.140"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.75",
                                    "versionEndExcluding": "6.12.88"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242"
                },
                {
                    "url": "https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d"
                }
            ],
            "title": "iommu/amd: serialize sequence allocation under concurrent TLB invalidations",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}