CVE-2026-53126None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= f05837ed73d0c73e950b2d9f2612febb0d3d451e < 4048ed98860d3785645ebbd34f69566a6c7320c3Linux >= f05837ed73d0c73e950b2d9f2612febb0d3d451e < 73a5af059905d171b398c8b2381632ee499948b5Linux >= f05837ed73d0c73e950b2d9f2612febb0d3d451e < b3e005f16cd98f815429a87aef4c61e9c140779fLinux >= f05837ed73d0c73e950b2d9f2612febb0d3d451e < 000e8454692cab9d1f1b80130e2870e355301d06Linux >= f05837ed73d0c73e950b2d9f2612febb0d3d451e < 23308af722fefed00af5f238024c11710938fba3Linux 6.3Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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