CVE-2026-97990

{
  "id": "CVE-2026-97990",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-25T11:17:27.113",
  "lastModified": "2026-10-19T10:17:50.350",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa_sim_net: check TX pull result before RX copy\n\nvringh_iov_pull_iotlb() returns a signed byte count.  A failed TX pull is\ncurrently added to the unsigned byte counter and then passed as a size_t\nlength to receive_filter() and vringh_iov_push_iotlb().  A negative error\ncan therefore become a large length in the RX path.\n\nHandle non-positive pull results before every length use.  Count the TX\nerror and complete the consumed TX descriptor with zero bytes.\n\nI found this bug myself, though the patch was written with AI assistance."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_net.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "cfe226892913a448e83e7a19db93862baa3cb99c",
              "lessThan": "1b803d382cde6d85755b363f22010208a04ba40a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfe226892913a448e83e7a19db93862baa3cb99c",
              "lessThan": "c001abcde865b74231da8f1412c3217dbf66781e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfe226892913a448e83e7a19db93862baa3cb99c",
              "lessThan": "3af20238a09ca180d66623e3bed16b64e9975f39",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfe226892913a448e83e7a19db93862baa3cb99c",
              "lessThan": "2bbf1c1f69991e28787e02b0a2f826289d5fc730",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfe226892913a448e83e7a19db93862baa3cb99c",
              "lessThan": "0d195797a80b77f2ec56718cd26d3ee65d0093e8",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/vdpa/vdpa_sim/vdpa_sim_net.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.19",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.19",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.158",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.7",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.1,
        "impactScore": 5.8
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0d195797a80b77f2ec56718cd26d3ee65d0093e8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1b803d382cde6d85755b363f22010208a04ba40a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2bbf1c1f69991e28787e02b0a2f826289d5fc730",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3af20238a09ca180d66623e3bed16b64e9975f39",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c001abcde865b74231da8f1412c3217dbf66781e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}