CVE-2026-31747
comedi: me4000: Fix potential overrun of firmware buffer
Reported by linux · Published May 1, 2026
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.
EPSS 0.13% · 2.5th percentile
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Linux | Linux | f72b5567f7c117b46b4058dc6a0c7554f8565561, eae19cab44204537f79146f15a51811b13227c38, de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d, 99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5, 8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6, 64b24b713e1a3ea6624480594b4f8c2ff86502f2, 3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7, 1603dd471f47762e9d1f52304edb3e49a7e62655 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | ac584af599452748187cf6d7865b1607c54ee443, ac584af599452748187cf6d7865b1607c54ee443, ac584af599452748187cf6d7865b1607c54ee443 |
| Linux | Linux | 3.19, 0, 5.10.253 |
| Linux | Linux | *, 6.1.168, 6.12.81 |
| linux | linux_kernel | 3.19, 3.19, 3.19 |
Timeline
- May 1, 2026 CVE Published
- May 7, 2026 CVE Updated
- May 18, 2026 EPSS Score (25 in total, the first dated here)
- Jun 2, 2026 Security Advisory (120 in total, the first dated here)
- Jul 28, 2026 Coalition ESS Score
- Aug 11, 2026 Distribution Patch (114 in total, the first dated here)
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