CVE-2026-80836

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - bound the akcipher result length virtio_crypto_dataq_akcipher_callback() sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). Clamp the reported length to the originally requested destination length. A conforming device reports no more than that, so valid results are unaffected.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-04 16:18:11.913000

Last modified

2026-10-30 13:20:11.857000

View original CVE JSON

{
  "id": "CVE-2026-80836",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-04T16:18:11.913",
  "lastModified": "2026-10-30T13:20:11.857",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: virtio - bound the akcipher result length\n\nvirtio_crypto_dataq_akcipher_callback() sets the result length from the\ndevice-reported response length without bounding it to the destination\nbuffer, which was allocated for the original request length.\nsg_copy_from_buffer() then reads that many bytes from the destination\nbuffer; a backend reporting a larger length over-reads adjacent kernel\nheap into the caller's scatterlist (an out-of-bounds read).\n\nClamp the reported length to the originally requested destination length.\nA conforming device reports no more than that, so valid results are\nunaffected."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "e0ffee8adc71a0bc548e5ebc6e021c013a874d79",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "12c4f29e97f31b013f77ad65ba7daeb02aaa6abe",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "5545de5050cbc3594506d74f2c392b0716cf8bca",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "3fda114a42f1510a4ec8a0b17a0cfc997952ccc2",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "1f9f877b1ef1fbd4ee95571cddf39c8002cee252",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a",
              "lessThan": "f77a956f6a19f9463ef1527c9d0cda50dded6b92",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/crypto/virtio/virtio_crypto_akcipher_algs.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": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "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": "6.18.49",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.13",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.3",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/12c4f29e97f31b013f77ad65ba7daeb02aaa6abe",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1f9f877b1ef1fbd4ee95571cddf39c8002cee252",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3fda114a42f1510a4ec8a0b17a0cfc997952ccc2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5545de5050cbc3594506d74f2c392b0716cf8bca",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e0ffee8adc71a0bc548e5ebc6e021c013a874d79",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f77a956f6a19f9463ef1527c9d0cda50dded6b92",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}