---
cve: "CVE-2026-53126"
severity: "LOW"
cvss: 3.1
epss: "11%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-24 17:17:27"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T07:49:21+02:00"
---

# CVE-2026-53126

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.6.141
- Kernel ≥ 6.12.91
- Kernel ≥ 6.18.33
- Kernel ≥ 7.0.10

## Referenzen

- <https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3>
- <https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5>
- <https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f>
- <https://git.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06>
- <https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53126) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_