CVE-2021-47538

rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()

Severity Score

3.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: rxrpc: corrigió la fuga de rxrpc_local en rxrpc_lookup_peer() Es necesario llamar a rxrpc_put_local() para el candidato par antes de kfree(), ya que contiene una referencia a rxrpc_local. [DH: v2: modificado para abstraer el código de liberación del par en una función]

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

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-24 CVE Reserved
2024-05-24 CVE Published
2024-12-19 CVE Updated
2025-03-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (8)

URL	Tag	Source
https://git.kernel.org/stable/c/e8e51ce79c157188e209e5ea0afaf6b42dd76104	Vuln. Introduced
https://git.kernel.org/stable/c/9ebeddef58c41bd700419cdcece24cf64ce32276	Vuln. Introduced
https://git.kernel.org/stable/c/9b7fc03b4cdbfb668b6891967105258691c6d3b5	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/913c24af2d13a3fd304462916ee98e298d56bdce	2021-12-08
https://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503a	2021-12-08
https://git.kernel.org/stable/c/60f0b9c42cb80833a03ca57c1c8b078d716e71d1	2021-12-08
https://git.kernel.org/stable/c/9469273e616ca8f1b6e3773c5019f21b4c8d828c	2021-12-08
https://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29	2021-11-29

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.19.82 < 4.19.220 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.82 < 4.19.220"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.4.164 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.4.164"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.10.84 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.10.84"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.15.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.15.7"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.4 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4 < 5.16"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.3.9 Search vendor "Linux" for product "Linux Kernel" and version "5.3.9"		en		Affected