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CVE-2023-53269

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

MEDIUM
5.5
CVSS Score
Published: September 16, 2025 at 08:06 AM UTC
Updated: June 17, 2026 at 06:44 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

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

Linux Kernel· Linux
95%
6.0 ≤ v < 6.1.246.0 ≤ v < 6.2.116.0 ≤ v < 6.36.2 ≤ v < 6.2.116.06.3 rc16.3 rc26.3 rc36.3 rc46.3 rc571f28f3136aff5890cd56de78abc673f8393cad9
Vendor states this is fixed in 1d1665279a845d16c93687389e364386e3fe0f38 (fixed)
Vendor states this is fixed in 231a49460ac0203270da2471928d392e5586370f (fixed)
Vendor states this is fixed in 9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1e (fixed)
Vendor states this is fixed in 6.0 (unaffected)
Vendor states this is fixed in 6.1.24 (unaffected)
Vendor states this is fixed in 6.2.11 (unaffected)
Vendor states this is fixed in 6.3 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1d1665279a845d16c93687389e364386e3fe0f38
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/231a49460ac0203270da2471928d392e5586370f
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1e

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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