{"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":"2026-05-14T14:30:14.695Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-14T14:30:14.695Z"},"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":"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"},{"version":"f2f65b28d802a667119147444ec2ae33eebf9a58","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":"6.12.75","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":"6.12.75","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.128"}]}]}],"references":[{"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"}}}}