CVE-2021-47071

uio_hv_generic: Fix a memory leak in error handling paths

Severity Score

5.5

*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: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be
updated and 'hv_uio_cleanup()' in the error handling path will not be
able to free the corresponding buffer. In such a case, we need to free the buffer explicitly.

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be updated and 'hv_uio_cleanup()' in the error handling path will not be able to free the corresponding buffer. In such a case, we need to free the buffer explicitly.

The SUSE Linux Enterprise 15 SP3 LTSS kernel was updated to receive various security bug fixes.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-29 CVE Reserved
2024-03-01 CVE Published
2025-04-10 EPSS Updated
2025-05-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/cdfa835c6e5e87d145f9f632b58843de97509f2b	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/cdd91637d4ef33e2be19a8e16e72e7d00c996d76	2021-05-26
https://git.kernel.org/stable/c/d84b5e912212b05f6b5bde9f682046accfbe0354	2021-05-26
https://git.kernel.org/stable/c/53486c467e356e06aa37047c984fccd64d78c827	2021-05-26
https://git.kernel.org/stable/c/3ee098f96b8b6c1a98f7f97915f8873164e6af9d	2021-05-14

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"				>= 4.20 < 5.4.122 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.122"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.10.40 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.10.40"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.12.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.12.7"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.13"		en		Affected