{"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": "2026-05-06T11:28:20.905Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-06T11:28:20.905Z"}, "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": "e15768e68820142077bbca402d8e902f64ade1b0", "lessThan": "5000ce7fcb31067566a1a1a2e5b5bbff93625242", "status": "affected", "versionType": "git"}, {"version": "496269d12072ecb219826485bdbec70c92a8eef5", "lessThan": "48caa7542a795c9679ec1bd1bc2592e05a7369a4", "status": "affected", "versionType": "git"}, {"version": "d2a0cac10597068567d336e85fa3cbdbe8ca62bf", "lessThan": "9e249c48412828e807afddc21527eb734dc9bd3d", "status": "affected", "versionType": "git"}, {"version": "f2f65b28d802a667119147444ec2ae33eebf9a58", "status": "affected", "versionType": "git"}, {"version": "715c263119fd1b918a9fcbd8a36ea5b604a46324", "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"]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.75"}]}]}], "references": [{"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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-43220", "lastModified": "2026-05-06T13:07:51.607", "metrics": {}, "published": "2026-05-06T12:16:41.660", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e15768e68820142077bbca402d8e902f64ade1b0,5000ce7fcb31067566a1a1a2e5b5bbff93625242)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[496269d12072ecb219826485bdbec70c92a8eef5,48caa7542a795c9679ec1bd1bc2592e05a7369a4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d2a0cac10597068567d336e85fa3cbdbe8ca62bf,9e249c48412828e807afddc21527eb734dc9bd3d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f2f65b28d802a667119147444ec2ae33eebf9a58"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "715c263119fd1b918a9fcbd8a36ea5b604a46324"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T15:30:06.079338+00:00", "updated": "2026-05-06T17:45:08.225951+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}