CVE-2021-47207

MEDIUM

Linux Kernel < 4.4.293 - Null Pointer Dereference in ALSA Gus DMA Block Handling

Title source: llm
STIX 2.1

Description

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.

References (8)

Core 8

Scores

CVSS v3 5.5
EPSS 0.0023
EPSS Percentile 13.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (19)
Linux/Linux < 2.6.12
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 16721797dcef2c7c030ffe73a07f39a65f9323c3
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 1ac6cd87d8ddd36c43620f82c4d65b058f725f0f
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 3e28e083dcdf03a18a083f8a47b6bb6b1604b5be
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 542fa721594a02d2aee0370a764d306ef48d030c
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - a0d21bb3279476c777434c40d969ea88ca64f9aa
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - ab4c1ebc40f699f48346f634d7b72b9c5193f315
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - c6d2cefdd05c4810c416fb8d384b5c377bd977bc
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - cb09c760c201f82df83babc92a5ffea0a01807fc
Linux/Linux 2.6.12
... and 9 more
Published Apr 10, 2024
Tracked Since Feb 18, 2026