CVE-2021-47207

ALSA: gus: fix null pointer dereference on pointer block

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: ALSA: gus: fix null pointer dereference on pointer block The pointer block return from snd_gf1_dma_next_block could be
null, so there is a potential null pointer dereference issue.
Fix this by adding a null check before dereference.

In the Linux kernel, the following vulnerability has been resolved: ALSA: gus: fix null pointer dereference on pointer block The pointer block return from snd_gf1_dma_next_block could be null, so there is a potential null pointer dereference issue. Fix this by adding a null check before dereference.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-03-25 CVE Reserved
2024-04-10 CVE Published
2024-12-19 CVE Updated
2025-03-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (8)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/3e28e083dcdf03a18a083f8a47b6bb6b1604b5be	2021-11-26
https://git.kernel.org/stable/c/cb09c760c201f82df83babc92a5ffea0a01807fc	2021-11-26
https://git.kernel.org/stable/c/542fa721594a02d2aee0370a764d306ef48d030c	2021-11-26
https://git.kernel.org/stable/c/ab4c1ebc40f699f48346f634d7b72b9c5193f315	2021-11-26
https://git.kernel.org/stable/c/c6d2cefdd05c4810c416fb8d384b5c377bd977bc	2021-11-26
https://git.kernel.org/stable/c/1ac6cd87d8ddd36c43620f82c4d65b058f725f0f	2021-11-26
https://git.kernel.org/stable/c/16721797dcef2c7c030ffe73a07f39a65f9323c3	2021-11-25
https://git.kernel.org/stable/c/a0d21bb3279476c777434c40d969ea88ca64f9aa	2021-10-26

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"				< 4.4.293 Search vendor "Linux" for product "Linux Kernel" and version " < 4.4.293"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.9.291 Search vendor "Linux" for product "Linux Kernel" and version " < 4.9.291"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.14.256 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.256"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.218 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.218"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.162 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.162"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.82 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.82"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.15.5 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.5"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.16 Search vendor "Linux" for product "Linux Kernel" and version " < 5.16"		en		Affected