CVE-2021-47289

ACPI: fix NULL pointer dereference

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e patch
https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc patch
https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4 patch
https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4 patch

Frequently Asked Questions

What is the severity of CVE-2021-47289?
CVE-2021-47289 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47289?
To fix CVE-2021-47289, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47289 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47289 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47289?
CVE-2021-47289 affects Linux Linux, Linux Linux.
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