Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-53126

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current() Add the missing put_disk() on the error path in blkcg_may…

Published Jun 24, 2026EPSS 0.11%

Overview

CVE-2026-53126 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()

Add the missing put_disk() on the error path in

blkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or

blkg_tryget() fails, the function jumps to the out label which only

calls rcu_read_unlock() but does not release the disk reference acquired

by blkcg_schedule_throttle() via get_device(). Since current->throttle_disk

is already set to NULL before the lookup, blkcg_exit() cannot release

this reference either, causing the disk to never be freed.

Restore the reference release that was present as blk_put_queue() in the

original code but was inadvertently dropped during the conversion from

request_queue to gendisk.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06Refgit.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3Refgit.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3Refgit.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5Refgit.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53126?

CVE-2026-53126 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53126?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53126?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53126?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53126 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999