# CVE-2023-53269: linux: In the Linux kernel, the following vulnerability has been resolved:  block: ublk: make sure that block size is set co...

CVE-2023-53269 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53269, released September 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53269
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-53269](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53269.md) | Sep 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-53269](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53269.md) | Sep 16, 2025 |
| Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-53269](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53269.md) | Sep 16, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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