CVE-2026-31748

comedi: me_daq: Fix potential overrun of firmware buffer

State: Published
Severity: Not scored
Published: May 1, 2026
Updated: May 11, 2026
Reserved: Mar 9, 2026

Description

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`.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	85acac61096f946a78cf0c4b65f7cebe580693b6 to before 2fc25a4c2e055cd42ea39a1b42c89bfef70e0319Affected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before 9f39fa07259eb342908e4aa0271dee038a8ce4f8Affected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8Affected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before c16ac4e173a05011437a2d868f70cc415339065aAffected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before 1bf8761eb59e94bf7b8c17b2a1ee48f14378b172Affected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before a47ae40339c1048f519df33ff8840731720f57cbAffected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before c8c607a77aab783f2e38cc2e0f24aa6c8f6d200bAffected 85acac61096f946a78cf0c4b65f7cebe580693b6 to before cc797d4821c754c701d9714b58bea947e31dbbe0Affected
LinuxLinux	2.6.29Affected before 2.6.29Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.168 through 6.1.Not affected 6.6.134 through 6.6.Not affected 6.12.81 through 6.12.Not affected 6.18.22 through 6.18.Not affected 6.19.12 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

85acac61096f946a78cf0c4b65f7cebe580693b6 to before 2fc25a4c2e055cd42ea39a1b42c89bfef70e0319Affected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before 9f39fa07259eb342908e4aa0271dee038a8ce4f8Affected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8Affected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before c16ac4e173a05011437a2d868f70cc415339065aAffected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before 1bf8761eb59e94bf7b8c17b2a1ee48f14378b172Affected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before a47ae40339c1048f519df33ff8840731720f57cbAffected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before c8c607a77aab783f2e38cc2e0f24aa6c8f6d200bAffected
85acac61096f946a78cf0c4b65f7cebe580693b6 to before cc797d4821c754c701d9714b58bea947e31dbbe0Affected

LinuxLinux

2.6.29Affected
before 2.6.29Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.168 through 6.1.*Not affected
6.6.134 through 6.6.*Not affected
6.12.81 through 6.12.*Not affected
6.18.22 through 6.18.*Not affected
6.19.12 through 6.19.*Not affected
7.0 and laterNot affected

References

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