CVE-2026-31748
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()`.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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`.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172Patch
- https://git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319Patch
- https://git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8Patch
- https://git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cbPatch
- https://git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065aPatch
- https://git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200bPatch
- https://git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0Patch
- https://git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.