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

2024-05-2415:09:34

Linux

github.com

linux kernel

use after free

vulnerability

fix

sja1000

ems_pcmcia_add_card

channel

pdev->irq

cve-2021-47521

AI Score

Confidence

Low

EPSS

Percentile

5.1%

SSVC

Exploitation

none

Automatable

Technical Impact

total

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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    "programFiles": [
      "drivers/net/can/sja1000/ems_pcmcia.c"
    ],
    "defaultStatus": "unaffected"
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    ],
    "programFiles": [
      "drivers/net/can/sja1000/ems_pcmcia.c"
    ],
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