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Unrated severityNVD Advisory· Published Dec 30, 2025· Updated Apr 15, 2026

CVE-2023-54209

CVE-2023-54209

Description

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

block: fix blktrace debugfs entries leakage

Commit 99d055b4fd4b ("block: remove per-disk debugfs files in blk_unregister_queue") moves blk_trace_shutdown() from blk_release_queue() to blk_unregister_queue(), this is safe if blktrace is created through sysfs, however, there is a regression in corner case.

blktrace can still be enabled after del_gendisk() through ioctl if the disk is opened before del_gendisk(), and if blktrace is not shutdown through ioctl before closing the disk, debugfs entries will be leaked.

Fix this problem by shutdown blktrace in disk_release(), this is safe because blk_trace_remove() is reentrant.

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Affected products

64

Patches

Vulnerability mechanics

References

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