CVE-2024-49941
gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()
Published 2 y ago · modified 4 mo ago · JSON
Summary
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`.
CISA SSVC assessment
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction (EPSS)
0.20% probability of exploitation in the next 30 days, higher than 10% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
Classification
- Weakness
- CWE-476 NULL Pointer Dereference
- Technology feeds
- Linux kernel (RSS, critical only)
References
- git.kernel.org /stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb
- git.kernel.org /stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28a
Sources
- CVE List: CVE-2024-49941
- NVD: CVE-2024-49941
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