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

Vulnerability from cvelistv5 – Published: 2026-09-04 15:54 – Updated: 2026-09-04 15:54
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux 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: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/virtio/virtio_crypto_akcipher_algs.c"
          ],
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          "versions": [
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              "versionType": "git"
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              "negate": false,
              "operator": "OR"
            }
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        {
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          "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."
        }
      ],
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        "dateUpdated": "2026-09-04T15:54:44.981Z",
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        "shortName": "Linux"
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    "dateReserved": "2026-08-26T14:34:25.796Z",
    "dateUpdated": "2026-09-04T15:54:44.981Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-18",
      "epss": "0.00168",
      "percentile": "0.06487"
    },
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      "version": "1"
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          }
        ],
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        "metrics": {},
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      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.