Vulnerability-Lookup

GHSA-5J64-84JF-59Q3

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix integer overflow in rxgk_verify_response()

In rxgk_verify_response(), there's a potential integer overflow due to rounding up token_len before checking it, thereby allowing the length check to be bypassed.

Fix this by checking the unrounded value against len too (len is limited as the response must fit in a single UDP packet).

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31633"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix integer overflow in rxgk_verify_response()\n\nIn rxgk_verify_response(), there\u0027s a potential integer overflow due to\nrounding up token_len before checking it, thereby allowing the length check to\nbe bypassed.\n\nFix this by checking the unrounded value against len too (len is limited as\nthe response must fit in a single UDP packet).",
  "id": "GHSA-5j64-84jf-59q3",
  "modified": "2026-04-24T15:32:36Z",
  "published": "2026-04-24T15:32:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31633"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31633 (GCVE-0-2026-31633)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:44 – Updated: 2026-04-24 14:44

Title

rxrpc: Fix integer overflow in rxgk_verify_response()

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix integer overflow in rxgk_verify_response() In rxgk_verify_response(), there's a potential integer overflow due to rounding up token_len before checking it, thereby allowing the length check to be bypassed. Fix this by checking the unrounded value against len too (len is limited as the response must fit in a single UDP packet).

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/1f864d9daaf622aea…
	https://git.kernel.org/stable/c/c1e242beb6b1efc3c…
	https://git.kernel.org/stable/c/699e52180f4231c25…

Impacted products

Vendor

Product

Version

Linux

Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 1f864d9daaf622aeaa774404fd51e7d6a435b046 (git)
Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < c1e242beb6b1efc3c286f617e8d940c8fbf2ed41 (git)
Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 699e52180f4231c257821c037ed5c99d5eb0edb8 (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1f864d9daaf622aeaa774404fd51e7d6a435b046",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            },
            {
              "lessThan": "c1e242beb6b1efc3c286f617e8d940c8fbf2ed41",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            },
            {
              "lessThan": "699e52180f4231c257821c037ed5c99d5eb0edb8",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.13",
              "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": "6.18.23",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.13",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix integer overflow in rxgk_verify_response()\n\nIn rxgk_verify_response(), there\u0027s a potential integer overflow due to\nrounding up token_len before checking it, thereby allowing the length check to\nbe bypassed.\n\nFix this by checking the unrounded value against len too (len is limited as\nthe response must fit in a single UDP packet)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:44:48.621Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41"
        },
        {
          "url": "https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8"
        }
      ],
      "title": "rxrpc: Fix integer overflow in rxgk_verify_response()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31633",
    "datePublished": "2026-04-24T14:44:48.621Z",
    "dateReserved": "2026-03-09T15:48:24.125Z",
    "dateUpdated": "2026-04-24T14:44:48.621Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-5J64-84JF-59Q3

CVE-2026-31633 (GCVE-0-2026-31633)

Tags

Sightings

Nomenclature