CVE-2025-21745: blk-cgroup: Fix class @block_class's subsystem refcount leakage
blk-cgroup: Fix class @blockclass's subsystem refcount leakage
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 5.15.179.1-1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.78.1-3
Event History
Frequently Asked Questions
What is the severity of CVE-2025-21745?
The severity of CVE-2025-21745 has not been explicitly rated but is related to a refcount leakage in the Linux kernel.
How do I fix CVE-2025-21745?
To fix CVE-2025-21745, you should update the Linux kernel to a patched version that addresses this vulnerability.
Which versions of the Linux kernel are affected by CVE-2025-21745?
CVE-2025-21745 affects Linux kernel versions from 5.9 to 6.1.129, 6.2 to 6.6.78, 6.7 to 6.12.14, and 6.13 to 6.13.3.
What are the potential impacts of CVE-2025-21745?
CVE-2025-21745 can lead to resource management issues due to the refcount leakage in block cgroup handling.
Is there a public exploit for CVE-2025-21745?
As of now, there is no known public exploit for CVE-2025-21745.