CVE-2021-47207: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Linux Linux Kernel: before 4.4.293 (fixed in 4.4.293); from 4.5, before 4.9.291 (fixed in 4.9.291); from 4.10, before 4.14.256 (fixed in 4.14.256); from 4.15, before 4.19.218 (fixed in 4.19.218); from 4.20, before 5.4.162 (fixed in 5.4.162); from 5.5, before 5.10.82 (fixed in 5.10.82); …

Published 2024-04-10. Last modified 2026-06-17.