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

Summary

comedi: me_daq: Fix potential overrun of firmware buffer

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Affected packages

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.29"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.134"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.81"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2026-31748 linux-lts Fixed in: 6.1.168-r0
Debian DEBIAN-CVE-2026-31748 linux Fixed in: 5.10.257-1
Ubuntu UBUNTU-CVE-2026-31748 linux

Summary

Original description

Affected packages

Fix status by distribution

References