CVE-2024-56764

Published: January 13, 2025Last modified: January 13, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: detach gendisk from ublk device if add_disk() fails Inside ublk_abort_requests(), gendisk is grabbed for aborting all inflight requests. And ublk_abort_requests() is called when exiting the uring context or handling timeout. If add_disk() fails, the gendisk may have been freed when calling ublk_abort_requests(), so use-after-free can be caused when getting disk's reference in ublk_abort_requests(). Fixes the bug by detaching gendisk from ublk device if add_disk() fails.

Severity score breakdown

Status

References

• https://git.kernel.org/stable/c/75cd4005da5492129917a4a4ee45e81660556104
• https://git.kernel.org/stable/c/7d680f2f76a3417fdfc3946da7471e81464f7b41