Log in Start free

Vulnerability · Published Apr 10, 2024 · Assigned by Linux

CVE-2021-47207ALSA: gus: fix null pointer dereference on pointer block

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.5-1DEBIAN-CVE-2021-47207
Debian:13linux5.15.5-1DEBIAN-CVE-2021-47207
Debian:14linux5.15.5-1DEBIAN-CVE-2021-47207
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47207
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47207
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47207

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 3e28e083dcdf03a18a083f8a47b6bb6b1604b5be1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before cb09c760c201f82df83babc92a5ffea0a01807fc1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 542fa721594a02d2aee0370a764d306ef48d030c1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before ab4c1ebc40f699f48346f634d7b72b9c5193f3151da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before c6d2cefdd05c4810c416fb8d384b5c377bd977bc1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 1ac6cd87d8ddd36c43620f82c4d65b058f725f0f1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 16721797dcef2c7c030ffe73a07f39a65f9323c31da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before a0d21bb3279476c777434c40d969ea88ca64f9aa
Linux Linux 2.6.12

References