CVE-2026-31677 (GCVE-0-2026-31677)
Vulnerability from cvelistv5
Published
2026-04-25 08:46
Modified
2026-05-11 22:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.
References
Impacted products
Vendor Product Version
Linux Linux Version: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a
Version: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a
Version: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a
Version: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "crypto/af_alg.c",
            "crypto/algif_skcipher.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9",
              "status": "affected",
              "version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
              "versionType": "git"
            },
            {
              "lessThan": "07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453",
              "status": "affected",
              "version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
              "versionType": "git"
            },
            {
              "lessThan": "4a264b2614c73c96666e196bbabe0cead52bdba7",
              "status": "affected",
              "version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
              "versionType": "git"
            },
            {
              "lessThan": "8eceab19eba9dcbfd2a0daec72e1bf48aa100170",
              "status": "affected",
              "version": "e870456d8e7c8d57c059ea479b5aadbb55ff4c3a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "crypto/af_alg.c",
            "crypto/algif_skcipher.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.83",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - limit RX SG extraction by receive buffer budget\n\nMake af_alg_get_rsgl() limit each RX scatterlist extraction to the\nremaining receive buffer budget.\n\naf_alg_get_rsgl() currently uses af_alg_readable() only as a gate\nbefore extracting data into the RX scatterlist. Limit each extraction\nto the remaining af_alg_rcvbuf(sk) budget so that receive-side\naccounting matches the amount of data attached to the request.\n\nIf skcipher cannot obtain enough RX space for at least one chunk while\nmore data remains to be processed, reject the recvmsg call instead of\nrounding the request length down to zero."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:13:30.305Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a264b2614c73c96666e196bbabe0cead52bdba7"
        },
        {
          "url": "https://git.kernel.org/stable/c/8eceab19eba9dcbfd2a0daec72e1bf48aa100170"
        }
      ],
      "title": "crypto: af_alg - limit RX SG extraction by receive buffer budget",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31677",
    "datePublished": "2026-04-25T08:46:53.379Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-05-11T22:13:30.305Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.