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CVE-2026-43055

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: scsi: target: file: Use kzalloc_flex for aio_cmd The target_core_file doesn't initialize the aio_cmd->iocb for the ki_write_str…

Published May 1, 2026EPSS 0.61%

Overview

CVE-2026-43055 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

scsi: target: file: Use kzalloc_flex for aio_cmd

The target_core_file doesn't initialize the aio_cmd->iocb for the

ki_write_stream. When a write command fd_execute_rw_aio() is executed,

we may get a bogus ki_write_stream value, causing unintended write

failure status when checking iocb->ki_write_stream > max_write_streams

in the block device.

Let's just use kzalloc_flex when allocating the aio_cmd and let

ki_write_stream=0 to fix this issue.

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/01f784fc9d0ab2a6dac45ee443620e517cb2a19bRefgit.kernel.org/stable/c/4eaff1728d0e69b95933412241bbccf4f797dba8Refgit.kernel.org/stable/c/ce54802fe6bb78eb0feffc66fed6a45d41ffc3ab

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43055?

CVE-2026-43055 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-43055?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-43055?

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-2026-43055?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43055 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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