CVE-2023-53269

block: ublk: make sure that block size is set correctly

State: Published
Severity: 5.5 Medium
Published: Sep 16, 2025
Updated: May 11, 2026
Reserved: Sep 16, 2025

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Description

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

block: ublk: make sure that block size is set correctly

block size is one very key setting for block layer, and bad block size could panic kernel easily.

Make sure that block size is set correctly.

Meantime if ublk_validate_params() fails, clear ub->params so that disk is prevented from being added.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	71f28f3136aff5890cd56de78abc673f8393cad9 to before 231a49460ac0203270da2471928d392e5586370fAffected 71f28f3136aff5890cd56de78abc673f8393cad9 to before 9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1eAffected 71f28f3136aff5890cd56de78abc673f8393cad9 to before 1d1665279a845d16c93687389e364386e3fe0f38Affected
LinuxLinux	6.0Affected before 6.0Not affected 6.1.24 through 6.1.Not affected 6.2.11 through 6.2.Not affected 6.3 and laterNot affected

References

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