CVE-2025-21745

MEDIUM

Linux Kernel - Refcount Leakage in blk-cgroup via class_dev_iter_exit() Omission

Title source: llm
STIX 2.1

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().

References (12)

Core 12
Core References

Scores

CVSS v3 5.5
EPSS 0.0022
EPSS Percentile 12.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (23)
linux/Kernel 5.11.0 - 5.15.179linux
linux/Kernel 5.16.0 - 6.1.129linux
linux/Kernel 5.9.0 - 5.10.235linux
linux/Kernel 6.13.0 - 6.13.3linux
linux/Kernel 6.2.0 - 6.6.78linux
linux/Kernel 6.7.0 - 6.12.14linux
Linux/Linux < 5.9
Linux/Linux 5.10.235 - 5.10.*
Linux/Linux 5.15.179 - 5.15.*
Linux/Linux 5.9
... and 13 more
Published Feb 27, 2025
Tracked Since Feb 18, 2026