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CVE-2024-56764

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

HIGH
7.8
CVSS Score
Published: January 6, 2025 at 04:20 PM UTC
Updated: August 5, 2026 at 12:44 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.7 ≤ v < 6.12.86.7 ≤ v < 6.136.13 rc16.13 rc26.13 rc36.13 rc4bd23f6c2c2d00518e2f27f2d25cef795de9bee56
Vendor states this is fixed in 75cd4005da5492129917a4a4ee45e81660556104 (fixed)
Vendor states this is fixed in 7d680f2f76a3417fdfc3946da7471e81464f7b41 (fixed)
Vendor states this is fixed in 6.12.8 (unaffected)
Vendor states this is fixed in 6.13 (unaffected)
Vendor states this is fixed in 6.7 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/75cd4005da5492129917a4a4ee45e81660556104
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7d680f2f76a3417fdfc3946da7471e81464f7b41

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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