CVE-2023-53269

MEDIUM

Linux Kernel - Denial of Service via Incorrect Block Size Handling in ublk

Title source: llm

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.

References (3)

Core 3

Core References

Patch

https://git.kernel.org/stable/c/231a49460ac0203270da2471928d392e5586370f

Patch

https://git.kernel.org/stable/c/9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1e

Patch

https://git.kernel.org/stable/c/1d1665279a845d16c93687389e364386e3fe0f38

Scores

CVSS v3 5.5

EPSS 0.0014

EPSS Percentile 4.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

Status published

Products (12)

linux/Kernel 6.0.0 - 6.1.24linux

linux/Kernel 6.2.0 - 6.2.11linux

Linux/Linux < 6.0

Linux/Linux 6.0

Linux/Linux 6.1.24 - 6.1.*

Linux/Linux 6.2.11 - 6.2.*

Linux/Linux 6.3

Linux/Linux 71f28f3136aff5890cd56de78abc673f8393cad9 - 1d1665279a845d16c93687389e364386e3fe0f38

Linux/Linux 71f28f3136aff5890cd56de78abc673f8393cad9 - 231a49460ac0203270da2471928d392e5586370f

Linux/Linux 71f28f3136aff5890cd56de78abc673f8393cad9 - 9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1e

... and 2 more

Published Sep 16, 2025

Tracked Since Feb 18, 2026