CVE-2026-31747

high

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

Vendor / product: Linux — linux kernel

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.

CVSS

7.8

7.8 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-05-01 15:16

Modified: 2026-11-11 21:10

NVD status: Analyzed

Last synced 5 hours ago

Verified against the source API 2026-11-11 21:11 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥3.19 <5.10.253, ≥5.11 <5.15.203, ≥5.16 <6.1.168, ≥6.2 <6.6.134, ≥6.7 <6.12.81, ≥6.13 <6.18.22

Weakness classification (CWE)

CWE-787

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655

Patch / mitigation: https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7

Patch / mitigation: https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2

Patch / mitigation: https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6

Patch / mitigation: https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5

Patch / mitigation: https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d

Patch / mitigation: https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38

Patch / mitigation: https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561

References

https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 21:11 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

CVE-2026-31747

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

Learn the basics

Related CVEs