{"id":"CVE-2026-31748","state":"PUBLISHED","title":"comedi: me_daq: Fix potential overrun of firmware buffer","description":"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`.","publishedAt":"2026-05-01T14:14:41.545Z","updatedAt":"2026-05-11T22:15:00.272Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"2fc25a4c2e055cd42ea39a1b42c89bfef70e0319","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"9f39fa07259eb342908e4aa0271dee038a8ce4f8","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"c16ac4e173a05011437a2d868f70cc415339065a","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"1bf8761eb59e94bf7b8c17b2a1ee48f14378b172","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"a47ae40339c1048f519df33ff8840731720f57cb","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"cc797d4821c754c701d9714b58bea947e31dbbe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/comedi/drivers/me_daq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/comedi/drivers/me_daq.c"]}],"references":["https://git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319","https://git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8","https://git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8","https://git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065a","https://git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172","https://git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cb","https://git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b","https://git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31748.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31748","state":"PUBLISHED","datePublished":"2026-05-01T14:14:41.545Z","dateUpdated":"2026-05-11T22:15:00.272Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.138Z"},"containers":{"cna":{"title":"comedi: me_daq: Fix potential overrun of firmware buffer","descriptions":[{"lang":"en","value":"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`."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"2fc25a4c2e055cd42ea39a1b42c89bfef70e0319","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"9f39fa07259eb342908e4aa0271dee038a8ce4f8","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"c16ac4e173a05011437a2d868f70cc415339065a","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"1bf8761eb59e94bf7b8c17b2a1ee48f14378b172","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"a47ae40339c1048f519df33ff8840731720f57cb","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b","versionType":"git"},{"version":"85acac61096f946a78cf0c4b65f7cebe580693b6","status":"affected","lessThan":"cc797d4821c754c701d9714b58bea947e31dbbe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/comedi/drivers/me_daq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.253","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/comedi/drivers/me_daq.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2fc25a4c2e055cd42ea39a1b42c89bfef70e0319"},{"url":"https://git.kernel.org/stable/c/9f39fa07259eb342908e4aa0271dee038a8ce4f8"},{"url":"https://git.kernel.org/stable/c/f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8"},{"url":"https://git.kernel.org/stable/c/c16ac4e173a05011437a2d868f70cc415339065a"},{"url":"https://git.kernel.org/stable/c/1bf8761eb59e94bf7b8c17b2a1ee48f14378b172"},{"url":"https://git.kernel.org/stable/c/a47ae40339c1048f519df33ff8840731720f57cb"},{"url":"https://git.kernel.org/stable/c/c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b"},{"url":"https://git.kernel.org/stable/c/cc797d4821c754c701d9714b58bea947e31dbbe0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:15:00.272Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}