CVE-2026-31748: Linux kernel · comedi: me_daq: Fix potential overrun of firmware buffer
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 11 Nov 2026, 23:24 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 1 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 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`.
References
- git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319 (opens in a new tab)
- git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8 (opens in a new tab)
- git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8 (opens in a new tab)
- git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065a (opens in a new tab)
- git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172 (opens in a new tab)
- git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cb (opens in a new tab)
- git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b (opens in a new tab)
- git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0 (opens in a new tab)