CVE-2021-47521 can: sja1000: fix use after free in ems_pcmcia_add_card()

2024-05-2415:09:34

Linux

www.cve.org

linux kernel

cve-2021-47521

use after free

sja1000

ems_pcmcia_add_card

channel setup

6.6 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

5.1%

JSON

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.

CNA Affected

[
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    "vendor": "Linux",
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    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/can/sja1000/ems_pcmcia.c"
    ],
    "versions": [
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    ],
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]