CVE-2021-47289

medium

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting in for_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointer that was possibly NULL. That fails miserably, because that helper inline function is not set up to handle that case. Just make acpi_dev_put() silently accept a NULL pointer, rather than calling down to put_device() with an invalid offset off that NULL pointer.

References

https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4

https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4

https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc

https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e

Details

Source: Mitre, NVD

Published: 2024-05-21

Updated: 2024-05-21

Risk Information

CVSS v2

Base Score: 4.6

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

Severity: Medium

CVSS v3

Base Score: 5.5

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

Severity: Medium