CVE-2026-31639 (GCVE-0-2026-31639)
Vulnerability from cvelistv5
Published
2026-04-24 14:44
Modified
2026-04-24 14:44
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix key reference count leak from call->key When creating a client call in rxrpc_alloc_client_call(), the code obtains a reference to the key. This is never cleaned up and gets leaked when the call is destroyed. Fix this by freeing call->key in rxrpc_destroy_call(). Before the patch, it shows the key reference counter elevated: $ cat /proc/keys | grep afs@54321 1bffe9cd I--Q--i 8053480 4169w 3b010000 1000 1000 rxrpc afs@54321: ka $ After the patch, the invalidated key is removed when the code exits: $ cat /proc/keys | grep afs@54321 $
References
Impacted products
Vendor Product Version
Linux Linux Version: f3441d4125fc98995858550a5521b8d7daf0504a
Version: f3441d4125fc98995858550a5521b8d7daf0504a
Version: f3441d4125fc98995858550a5521b8d7daf0504a
Version: f3441d4125fc98995858550a5521b8d7daf0504a
Version: f3441d4125fc98995858550a5521b8d7daf0504a
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/call_object.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f1a7a3ab0f35f83cf11bba906b9e948cf3788c28",
              "status": "affected",
              "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
              "versionType": "git"
            },
            {
              "lessThan": "e6b7943c5dc875647499da09bf4d50a8557ab0c3",
              "status": "affected",
              "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
              "versionType": "git"
            },
            {
              "lessThan": "2e6ef713b1598f6acd7f302fa6b12b6731c89914",
              "status": "affected",
              "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
              "versionType": "git"
            },
            {
              "lessThan": "978108902ee4ef2b348ff7ec36ad014dc5bc6dc6",
              "status": "affected",
              "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
              "versionType": "git"
            },
            {
              "lessThan": "d666540d217e8d420544ebdfbadeedd623562733",
              "status": "affected",
              "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/call_object.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.135",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.82",
              "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": "6.6.135",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.82",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.23",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.13",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix key reference count leak from call-\u003ekey\n\nWhen creating a client call in rxrpc_alloc_client_call(), the code obtains\na reference to the key.  This is never cleaned up and gets leaked when the\ncall is destroyed.\n\nFix this by freeing call-\u003ekey in rxrpc_destroy_call().\n\nBefore the patch, it shows the key reference counter elevated:\n\n$ cat /proc/keys | grep afs@54321\n1bffe9cd I--Q--i 8053480 4169w 3b010000  1000  1000 rxrpc     afs@54321: ka\n$\n\nAfter the patch, the invalidated key is removed when the code exits:\n\n$ cat /proc/keys | grep afs@54321\n$"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:44:52.769Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f1a7a3ab0f35f83cf11bba906b9e948cf3788c28"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6b7943c5dc875647499da09bf4d50a8557ab0c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e6ef713b1598f6acd7f302fa6b12b6731c89914"
        },
        {
          "url": "https://git.kernel.org/stable/c/978108902ee4ef2b348ff7ec36ad014dc5bc6dc6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d666540d217e8d420544ebdfbadeedd623562733"
        }
      ],
      "title": "rxrpc: Fix key reference count leak from call-\u003ekey",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31639",
    "datePublished": "2026-04-24T14:44:52.769Z",
    "dateReserved": "2026-03-09T15:48:24.125Z",
    "dateUpdated": "2026-04-24T14:44:52.769Z",
    "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.