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CVE-2026-31747

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: comedi: me4000: Fix potential overrun of firmware buffer `me4000_xilinx_download()` loads the firmware that was requested by `r…

Published May 1, 2026CWE-787EPSS 0.18%

Overview

CVE-2026-31747 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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: me4000: Fix potential overrun of firmware buffer

`me4000_xilinx_download()` loads the firmware that was requested by

`request_firmware()`. It is possible for it to overrun the source

buffer because it blindly trusts the file format. It reads a data

stream length from the first 4 bytes into variable `file_length` and

reads the data stream contents of length `file_length` from offset 16

onwards.

Add a test to ensure that the supplied firmware is long enough to

contain the header and the data stream. On failure, log an error and

return `-EINVAL`.

Note: The firmware loading was totally broken before commit ac584af59945

("staging: comedi: me4000: fix firmware downloading"), but that is the

most sensible target for this fix.

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/1603dd471f47762e9d1f52304edb3e49a7e62655Refgit.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7Refgit.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2Refgit.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6Refgit.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5Refgit.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597dRefgit.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38Refgit.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31747?

CVE-2026-31747 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-31747?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31747?

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-2026-31747?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31747 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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