rxrpc: Fix key reference count leak from call->key
Summary
| CVE | CVE-2026-31639 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-24 15:16:43 UTC |
| Updated | 2026-04-27 20:20:27 UTC |
| Description | 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 $ |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.000180000 probability, percentile 0.048130000 (date 2026-04-27)
Problem Types: NVD-CWE-Other
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f3441d4125fc98995858550a5521b8d7daf0504a f1a7a3ab0f35f83cf11bba906b9e948cf3788c28 git | Not specified |
| CNA | Linux | Linux | affected f3441d4125fc98995858550a5521b8d7daf0504a e6b7943c5dc875647499da09bf4d50a8557ab0c3 git | Not specified |
| CNA | Linux | Linux | affected f3441d4125fc98995858550a5521b8d7daf0504a 2e6ef713b1598f6acd7f302fa6b12b6731c89914 git | Not specified |
| CNA | Linux | Linux | affected f3441d4125fc98995858550a5521b8d7daf0504a 978108902ee4ef2b348ff7ec36ad014dc5bc6dc6 git | Not specified |
| CNA | Linux | Linux | affected f3441d4125fc98995858550a5521b8d7daf0504a d666540d217e8d420544ebdfbadeedd623562733 git | Not specified |
| CNA | Linux | Linux | affected 6.2 | Not specified |
| CNA | Linux | Linux | unaffected 6.2 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.135 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.82 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.23 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.13 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/978108902ee4ef2b348ff7ec36ad014dc5bc6dc6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/d666540d217e8d420544ebdfbadeedd623562733 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/f1a7a3ab0f35f83cf11bba906b9e948cf3788c28 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/2e6ef713b1598f6acd7f302fa6b12b6731c89914 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/e6b7943c5dc875647499da09bf4d50a8557ab0c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.