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CVE-2026-31750

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: comedi: runflags cannot determine whether to reclaim chanlist syzbot reported a memory leak [1], because commit 4e1da516debb ("…

Published May 1, 2026CWE-401EPSS 0.14%

Overview

CVE-2026-31750 is a medium-severity vulnerability. It was published on May 1, 2026 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:

comedi: runflags cannot determine whether to reclaim chanlist

syzbot reported a memory leak [1], because commit 4e1da516debb ("comedi:

Add reference counting for Comedi command handling") did not consider

the exceptional exit case in do_cmd_ioctl() where runflags is not set.

This caused chanlist not to be properly freed by do_become_nonbusy(),

as it only frees chanlist when runflags is correctly set.

Added a check in do_become_nonbusy() for the case where runflags is not

set, to properly free the chanlist memory.

[1]

BUG: memory leak

backtrace (crc 844a0efa):

__comedi_get_user_chanlist drivers/comedi/comedi_fops.c:1815 [inline]

do_cmd_ioctl.part.0+0x112/0x350 drivers/comedi/comedi_fops.c:1890

do_cmd_ioctl drivers/comedi/comedi_fops.c:1858 [inline]

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/29f644f14b89e6c4965e3c89251929e451190a66Refgit.kernel.org/stable/c/830c848aba9f047eb6b34288975ebeb8e8621451

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31750?

CVE-2026-31750 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31750?

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-2026-31750?

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-2026-31750?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31750 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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