{"id":"CVE-2026-31748","summary":"comedi: me_daq: Fix potential overrun of firmware buffer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: me_daq: Fix potential overrun of firmware buffer\n\n`me2600_xilinx_download()` loads the firmware that was requested by\n`request_firmware()`.  It is possible for it to overrun the source\nbuffer because it blindly trusts the file format.  It reads a data\nstream length from the first 4 bytes into variable `file_length` and\nreads the data stream contents of length `file_length` from offset 16\nonwards.  Although it checks that the supplied firmware is at least 16\nbytes long, it does not check that it is long enough to contain the data\nstream.\n\nAdd a test to ensure that the supplied firmware is long enough to\ncontain the header and the data stream.  On failure, log an error and\nreturn `-EINVAL`.","modified":"2026-07-08T07:15:47.230728054Z","published":"2026-05-01T14:14:41.545Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31748.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31748.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31748"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"85acac61096f946a78cf0c4b65f7cebe580693b6"},{"fixed":"2fc25a4c2e055cd42ea39a1b42c89bfef70e0319"},{"fixed":"9f39fa07259eb342908e4aa0271dee038a8ce4f8"},{"fixed":"f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8"},{"fixed":"c16ac4e173a05011437a2d868f70cc415339065a"},{"fixed":"1bf8761eb59e94bf7b8c17b2a1ee48f14378b172"},{"fixed":"a47ae40339c1048f519df33ff8840731720f57cb"},{"fixed":"c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b"},{"fixed":"cc797d4821c754c701d9714b58bea947e31dbbe0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31748.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"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"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31748.json"}}],"schema_version":"1.7.5"}