Riskcovery

CVE-2024-56764

ublk: detach gendisk from ublk device if add_disk() fails

State
Published
Severity
7.8 High
Published
Jan 6, 2025
Updated
Aug 5, 2026
Reserved
Dec 29, 2024

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • bd23f6c2c2d00518e2f27f2d25cef795de9bee56 to before 7d680f2f76a3417fdfc3946da7471e81464f7b41Affected
  • bd23f6c2c2d00518e2f27f2d25cef795de9bee56 to before 75cd4005da5492129917a4a4ee45e81660556104Affected
LinuxLinux
  • 6.7Affected
  • before 6.7Not affected
  • 6.12.8 through 6.12.*Not affected
  • 6.13 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.