What is CVE-2023-53269?

CVE-2023-53269 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.0 onward and patched in 6.1.24, 6.2.11 and 6.3. CVE-2023-53269 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53269?

CVE-2023-53269 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53269?

Yes, CVE-2023-53269 has been patched. Fixed versions include 6.1.24, 6.2.11 and 6.3. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53269 actively exploited?

CVE-2023-53269 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53269

Medium

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.

Package Linux Kernel

Published 2025-09-16

Last modified 2026-01-14

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.1.24, 6.2.11, 6.3 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.1.24 6.1.x ✓ 6.2.11 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53269 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1d1665279a845d16c93687389e364386e3fe0f38
Patch
Kernel patch commit
https://git.kernel.org/stable/c/231a49460ac0203270da2471928d392e5586370f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/9dbe85ac618ef6ae60abe5dd17ae2b29065d9c1e
Patch

Details

CVE ID CVE-2023-53269

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-16

Modified 2026-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53269?

CVE-2023-53269 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.24, 6.2.11 and 6.3. CVE-2023-53269 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53269?

CVE-2023-53269 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53269?

Yes — CVE-2023-53269 has been patched. Fixed versions include 6.1.24, 6.2.11 and 6.3. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53269 actively exploited?

No — CVE-2023-53269 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.