CVE-2021-47521
kernel: can: sja1000: fix use after free in ems_pcmcia_add_card()
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 24, 2024
Updated · November 21, 2025
Description
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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.8CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE-416 · Use After Free