High 7.8Published May 1, 2026

CVE-2026-31748comedi: me_daq: Fix potential overrun of firmware buffer

Updated under an hour ago (Oct 27, 2026, 1:30 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: comedi: me_daq: Fix potential overrun of firmware buffer `me2600_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. Although it checks that the supplied firmware is at least 16 bytes long, it does not check that it is long enough to contain the data stream. 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`.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	85acac61096f946a78cf0c4b65f7cebe580693b6 builds before 2fc25a4c2e055cd42ea39a1b42c89bfef70e0319; 85acac61096f946a78cf0c4b65f7cebe580693b6 builds before 9f39fa07259eb342908e4aa0271dee038a8ce4f8; from 85acac61096f946a78cf0c4b65f7cebe580693b6 before f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8; from 85acac61096f946a78cf0c4b65f7cebe580693b6 before c16ac4e173a05011437a2d868f70cc415339065a; 85acac61096f946a78cf0c4b65f7cebe580693b6 builds before 1bf8761eb59e94bf7b8c17b2a1ee48f14378b172; from 85acac61096f946a78cf0c4b65f7cebe580693b6 before a47ae40339c1048f519df33ff8840731720f57cb; from 85acac61096f946a78cf0c4b65f7cebe580693b6 before c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b; from 85acac61096f946a78cf0c4b65f7cebe580693b6 before cc797d4821c754c701d9714b58bea947e31dbbe0	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.29 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; and 5 more ranges	NVD

References

References

https://git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319	patch
https://git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8	patch
https://git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8	patch
https://git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065a	patch
https://git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172	patch
https://git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cb	patch
https://git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b	patch
https://git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.