In the Linux kernel, the following vulnerability has been resolved:
driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()
There are a potential wild pointer dereferences issue regarding APIs
class_dev_iter_(init|next|exit)(), as explained by below typical usage:
// All members of @iter are wild pointers.
struct class_dev_iter iter;
// class_dev_iter_init(@iter, @class, ...) checks parameter @class for
// potential class_to_subsys() error, and it returns void type and does
// not initialize its output parameter @iter, so caller can not detect
// the error and continues to invoke class_dev_iter_next(@iter) even if
// @iter still contains wild pointers.
class_dev_iter_init(&iter, ...);
// Dereference these wild pointers in @iter here once suffer the error.
while (dev = class_dev_iter_next(&iter)) { ... };
// Also dereference these wild pointers here.
class_dev_iter_exit(&iter);
Actually, all callers of these APIs have such usage pattern in kernel tree.
Fix by:
- Initialize output parameter @iter by memset() in class_dev_iter_init()
and give callers prompt by pr_crit() for the error.
- Check if @iter is valid in class_dev_iter_next().
References
Configurations
Configuration 1 (hide)
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History
28 Oct 2025, 02:55
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c - Patch | |
| References | () https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7 - Patch | |
| References | () https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1 - Patch | |
| References | () https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87 - Patch | |
| Summary |
|
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
27 Feb 2025, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-02-27 20:16
Updated : 2025-10-28 02:55
NVD link : CVE-2025-21810
Mitre link : CVE-2025-21810
CVE.ORG link : CVE-2025-21810
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference
