CVE-2023-53508

ublk: fail to start device if queue setup is interrupted

HIGH
7.8
CVSS Score
Published: October 1, 2025 at 11:45 AM UTC
Updated: June 17, 2026 at 06:45 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: fail to start device if queue setup is interrupted In ublk_ctrl_start_dev(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_START_DEV, otherwise kernel oops can be triggered. Reported by German when working on qemu-storage-deamon which requires single thread ublk daemon.

Affected

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

6.0 ≤ v < 6.1.436.0 ≤ v < 6.4.86.0 ≤ v < 6.56.2 ≤ v < 6.4.86.06.5 rc16.5 rc26.5 rc371f28f3136aff5890cd56de78abc673f8393cad9
Vendor states this is fixed in 0d5916c439574b18a0734872daa0022b3d6105ad (fixed)
Vendor states this is fixed in 53e7d08f6d6e214c40db1f51291bb2975c789dc2 (fixed)
Vendor states this is fixed in 6ab3e7d424cd413d7a5e976c8a30b4ffa84a65dd (fixed)
Vendor states this is fixed in 6.0 (unaffected)
Vendor states this is fixed in 6.1.43 (unaffected)
Vendor states this is fixed in 6.4.8 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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