CVE-2024-49941: gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: gpiolib: Fix potential NULL pointer dereference in gpiod_get_label() In `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may return a NULL pointer, leading to a scenario where `label->str` is accessed without verifying if `label` itself is NULL. This patch adds a proper NULL check for `label` before accessing `label->str`. The check for `label->str != NULL` is removed because `label->str` can never be NULL if `label` is not NULL. This fixes the issue where the label name was being printed as `(efault)` when dumping the sysfs GPIO file when `label == NULL`.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.9<6.11.3 | |
| Linux Kernel | =6.12-rc1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-49941?
CVE-2024-49941 has not been assigned a CVSS score yet, but it could potentially lead to denial of service due to a NULL pointer dereference.
How do I fix CVE-2024-49941?
To fix CVE-2024-49941, update your Linux kernel to the latest version where the vulnerability has been patched.
Which versions of the Linux kernel are affected by CVE-2024-49941?
CVE-2024-49941 affects Linux kernel versions 6.9 through 6.11.3 and 6.12-rc1.
What components are impacted by CVE-2024-49941?
CVE-2024-49941 impacts the gpiod subsystem, specifically the gpiod_get_label() function.
Is CVE-2024-49941 a critical vulnerability?
CVE-2024-49941 may lead to system crashes; however, its criticality depends on the specific use cases and deployment environments.
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