CVE-2021-46966

medium

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.

References

https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b

https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa

https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234

https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17

https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23

https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be

https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b

https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203

https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394

Details

Source: Mitre, NVD

Published: 2024-02-27

Updated: 2024-02-28

Risk Information

CVSS v2

Base Score: 6.5

Vector: CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 6.7

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Severity: Medium