CVE-2025-21745
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @block_class's subsystem refcount leakage blkcg_fill_root_iostats() iterates over @block_class's devices by class_dev_iter_(init|next)(), but does not end iterating with class_dev_iter_exit(), so causes the class's subsystem refcount leakage. Fix by ending the iterating with class_dev_iter_exit().
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedFeb 27, 2025
First seenFeb 27, 2025
How to fix
Update
- linux linux_kernel6.1.129, 6.6.78, 6.12.14, 6.13.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.9 ≤ v < 6.1.129, 6.2 ≤ v < 6.6.78, 6.7 ≤ v < 6.12.14, 6.13 ≤ v < 6.13.3 | 6.1.129, 6.6.78, 6.12.14, 6.13.3 |
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