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CVE-2023-53366

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO:…

Published Sep 17, 2025CWE-476EPSS 0.19%

Overview

CVE-2023-53366 is a medium-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

block: be a bit more careful in checking for NULL bdev while polling

Wei reports a crash with an application using polled IO:

PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0

Oops: 0000 [#1] SMP

CPU: 0 PID: 21915 Comm: iocore_0 Kdump: loaded Tainted: G S 5.12.0-0_fbk12_clang_7346_g1bb6f2e7058f #1

Hardware name: Wiwynn Delta Lake MP T8/Delta Lake-Class2, BIOS Y3DLM08 04/10/2022

RIP: 0010:bio_poll+0x25/0x200

Code: 0f 1f 44 00 00 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 65 48 8b 04 25 28 00 00 00 48 89 44 24 20 48 8b 47 08 <48> 8b 80 70 02 00 00 4c 8b 70 50 8b 6f 34 31 db 83 fd ff 75 25 65

RSP: 0018:ffffc90005fafdf8 EFLAGS: 00010292

RAX: 0000000000000000 RBX: 0000000000000000 RCX: 74b43cd65dd66600

RDX: 0000000000000003 RSI: ffffc90005fafe78 RDI: ffff8884b614e140

RBP: ffff88849964df78 R08: 0000000000000000 R09: 0000000000000008

R10: 0000000000000000 R11: 0000000000000000 R12: ffff88849964df

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0510d5e654d05053ed0e6309a9b42043ac9903abRefgit.kernel.org/stable/c/1af0bdca03f367874da45d6cbe05fa05b90b1439Refgit.kernel.org/stable/c/310726c33ad76cebdee312dbfafc12c1b44bf977

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53366?

CVE-2023-53366 is a medium-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53366?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-53366?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-53366?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53366 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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