5.5

CVE-2026-53126

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.3 < 6.6.141
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.91
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.11% 0.017
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3
Patch
https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5
Patch
https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f
Patch
https://git.kernel.org/stable/c/000e8454692cab9d1f1b80130e2870e355301d06
Patch
https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3
Patch