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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-53126

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • f05837ed73d0c73e950b2d9f2612febb0d3d451e to < 4048ed98860d3785645ebbd34f69566a6c7320c3affected
  • f05837ed73d0c73e950b2d9f2612febb0d3d451e to < 73a5af059905d171b398c8b2381632ee499948b5affected
  • f05837ed73d0c73e950b2d9f2612febb0d3d451e to < b3e005f16cd98f815429a87aef4c61e9c140779faffected
  • f05837ed73d0c73e950b2d9f2612febb0d3d451e to < 000e8454692cab9d1f1b80130e2870e355301d06affected
  • f05837ed73d0c73e950b2d9f2612febb0d3d451e to < 23308af722fefed00af5f238024c11710938fba3affected

Linux Linux

Default version status: affected

  • 6.3affected
  • 0 to < 6.3unaffected
  • 6.6.141 to ≤ 6.6.*unaffected
  • 6.12.91 to ≤ 6.12.*unaffected
  • 6.18.33 to ≤ 6.18.*unaffected
  • 7.0.10 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References