{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f2f65b28d802a667119147444ec2ae33eebf9a58"
            },
            {
              "fixed": "d51bf43193b1e95dc4e34e540dc76e19def2ae5a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "715c263119fd1b918a9fcbd8a36ea5b604a46324"
            },
            {
              "fixed": "fca7aa0264ae99e5ff287d0ced5af0b82b121c4f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "e15768e68820142077bbca402d8e902f64ade1b0"
            },
            {
              "fixed": "5000ce7fcb31067566a1a1a2e5b5bbff93625242"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "496269d12072ecb219826485bdbec70c92a8eef5"
            },
            {
              "fixed": "48caa7542a795c9679ec1bd1bc2592e05a7369a4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "d2a0cac10597068567d336e85fa3cbdbe8ca62bf"
            },
            {
              "fixed": "9e249c48412828e807afddc21527eb734dc9bd3d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.128"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.12.75"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43220.json"
  },
  "details": "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-\u003elock so completion sequence\nallocation is serialized with command queuing.\nAnd remove the unnecessary return.",
  "id": "CVE-2026-43220",
  "modified": "2026-07-15T01:49:08.659370312Z",
  "published": "2026-05-06T11:28:20.905Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43220.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43220"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "iommu/amd: serialize sequence allocation under concurrent TLB invalidations"
}