Vulnerability-Lookup

FKIE_CVE-2026-31639

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-04-27 20:20

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2e6ef713b1598f6acd7f302fa6b12b6731c89914	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/978108902ee4ef2b348ff7ec36ad014dc5bc6dc6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d666540d217e8d420544ebdfbadeedd623562733	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e6b7943c5dc875647499da09bf4d50a8557ab0c3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f1a7a3ab0f35f83cf11bba906b9e948cf3788c28	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.2
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
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  "cveTags": [],
  "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$"
    }
  ],
  "id": "CVE-2026-31639",
  "lastModified": "2026-04-27T20:20:27.680",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-24T15:16:43.240",
  "references": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "NVD-CWE-Other"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31639 (GCVE-0-2026-31639)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:44 – Updated: 2026-05-11 22:12

Title

rxrpc: Fix key reference count leak from call->key

Summary

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/f1a7a3ab0f35f83cf…
https://git.kernel.org/stable/c/e6b7943c5dc875647…
https://git.kernel.org/stable/c/2e6ef713b1598f6ac…
https://git.kernel.org/stable/c/978108902ee4ef2b3…
https://git.kernel.org/stable/c/d666540d217e8d420…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f3441d4125fc98995858550a5521b8d7daf0504a , < f1a7a3ab0f35f83cf11bba906b9e948cf3788c28 (git) Affected: f3441d4125fc98995858550a5521b8d7daf0504a , < e6b7943c5dc875647499da09bf4d50a8557ab0c3 (git) Affected: f3441d4125fc98995858550a5521b8d7daf0504a , < 2e6ef713b1598f6acd7f302fa6b12b6731c89914 (git) Affected: f3441d4125fc98995858550a5521b8d7daf0504a , < 978108902ee4ef2b348ff7ec36ad014dc5bc6dc6 (git) Affected: f3441d4125fc98995858550a5521b8d7daf0504a , < d666540d217e8d420544ebdfbadeedd623562733 (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.6.135 , ≤ 6.6.* (semver) Unaffected: 6.12.82 , ≤ 6.12.* (semver) Unaffected: 6.18.23 , ≤ 6.18.* (semver) Unaffected: 6.19.13 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
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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.

Action not permitted

FKIE_CVE-2026-31639

CVE-2026-31639 (GCVE-0-2026-31639)

Tags

Sightings

Nomenclature