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CVE-2021-47539

rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle()

MEDIUM
5.5
CVSS Score
Published: May 24, 2024 at 03:09 PM UTC
Updated: June 17, 2026 at 04:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() Need to call rxrpc_put_peer() for bundle candidate before kfree() as it holds a ref to rxrpc_peer. [DH: v2: Changed to abstract out the bundle freeing code into a function]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.10 ≤ v < 5.10.845.10 ≤ v < 5.15.75.10 ≤ v < 5.165.11 ≤ v < 5.15.7245500d853e9f20036cec7df4f6984ece4c6bf265.105.16 rc15.16 rc25.16 rc3
Vendor states this is fixed in 35b40f724c4ef0f683d94dab3af9ab38261d782b (fixed)
Vendor states this is fixed in bc97458620e38961af9505cc060ad4cf5c9e4af7 (fixed)
Vendor states this is fixed in ca77fba821351190777b236ce749d7c4d353102e (fixed)
Vendor states this is fixed in 5.10 (unaffected)
Vendor states this is fixed in 5.10.84 (unaffected)
Vendor states this is fixed in 5.15.7 (unaffected)
Vendor states this is fixed in 5.16 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/35b40f724c4ef0f683d94dab3af9ab38261d782b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bc97458620e38961af9505cc060ad4cf5c9e4af7
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ca77fba821351190777b236ce749d7c4d353102e

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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