CVE-2026-80836 (GCVE-0-2026-80836)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:54 – Updated: 2026-10-30 12:31
VLAI
Title
crypto: virtio - bound the akcipher result length
Summary
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
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < e0ffee8adc71a0bc548e5ebc6e021c013a874d79 (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78 (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < 12c4f29e97f31b013f77ad65ba7daeb02aaa6abe (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < 5545de5050cbc3594506d74f2c392b0716cf8bca (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2 (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < 1f9f877b1ef1fbd4ee95571cddf39c8002cee252 (git)
Affected: a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a , < f77a956f6a19f9463ef1527c9d0cda50dded6b92 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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          "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\u0027s 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:31:09.682Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/f77a956f6a19f9463ef1527c9d0cda50dded6b92"
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    "cveId": "CVE-2026-80836",
    "datePublished": "2026-09-04T15:54:44.981Z",
    "dateReserved": "2026-08-26T14:34:25.796Z",
    "dateUpdated": "2026-10-30T12:31:09.682Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-11-02",
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    },
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      "id": "msrc_CVE-2026-80836",
      "initial_release_date": "2026-09-07T01:49:42.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "crypto: virtio - bound the akcipher result length",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80836.json",
      "version": "6"
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            "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\u0027s 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."
          }
        ],
        "id": "CVE-2026-80836",
        "lastModified": "2026-10-30T13:20:11.857",
        "metrics": {},
        "published": "2026-09-04T16:18:11.913",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-10-25T22:52:01+00:00",
      "cve": "CVE-2026-80836",
      "id": "CVE-2026-80836",
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      "product_status:known_affected": "77",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: crypto: virtio - bound the akcipher result length",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80836.json",
      "version": "3"
    }
  }
}



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