What is CVE-2023-53508?

CVE-2023-53508 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.0 onward and patched in 6.1.43, 6.4.8 and 6.5. CVE-2023-53508 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53508?

CVE-2023-53508 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-53508?

Yes, CVE-2023-53508 has been patched. Fixed versions include 6.1.43, 6.4.8 and 6.5. 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-2023-53508 actively exploited?

CVE-2023-53508 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53508

High

In the Linux kernel, the following vulnerability has been resolved: ublk: fail to start device if queue setup is interrupted In ublk_ctrl_start_dev(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_START_DEV, otherwise kernel oops can be triggered. Reported by German when working on qemu-storage-deamon which requires single thread ublk daemon.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.1.43, 6.4.8, 6.5 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.1.43 6.1.x ✓ 6.4.8 6.4.x ✓ 6.5

References

The following references provide additional information about CVE-2023-53508 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/0d5916c439574b18a0734872daa0022b3d6105ad
Patch
Kernel patch commit
https://git.kernel.org/stable/c/53e7d08f6d6e214c40db1f51291bb2975c789dc2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6ab3e7d424cd413d7a5e976c8a30b4ffa84a65dd
Patch

Details

CVE ID CVE-2023-53508

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53508?

CVE-2023-53508 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.43, 6.4.8 and 6.5. CVE-2023-53508 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53508?

CVE-2023-53508 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-53508?

Yes — CVE-2023-53508 has been patched. Fixed versions include 6.1.43, 6.4.8 and 6.5. 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-2023-53508 actively exploited?

No — CVE-2023-53508 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.