CVE-2021-47521: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: can: sja1000: fix use after free in ems_pcmcia_add_card() If the last channel is not available then "dev" is freed. Fortunately, we can just use "pdev->irq" instead. Also we should check if at least one channel was set up.

Affected products

• Linux Linux Kernel: from 3.2, before 4.4.295 (fixed in 4.4.295); from 4.5, before 4.9.293 (fixed in 4.9.293); from 4.10, before 4.14.258 (fixed in 4.14.258); from 4.15, before 4.19.221 (fixed in 4.19.221); from 4.20, before 5.4.165 (fixed in 5.4.165); from 5.5, before 5.10.85 (fixed in 5.10.85); …

Published 2024-05-24. Last modified 2026-06-17.