CVE-2021-47521

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.

• linux linux kernel (>= 3.2 < 4.4.295) • linux linux kernel (>= 4.5 < 4.9.293) • linux linux kernel (>= 4.10 < 4.14.258) • linux linux kernel (>= 4.15 < 4.19.221) • linux linux kernel (>= 4.20 < 5.4.165) • linux linux kernel (>= 5.5 < 5.10.85) • linux linux kernel (>= 5.11 < 5.15.8)