{"id":"CVE-2026-93234","state":"PUBLISHED","title":"drm/gud: validate TV mode names before creating enum property","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: validate TV mode names before creating enum property\n\nThe GUD protocol returns TV mode names as fixed-size\nGUD_CONNECTOR_TV_MODE_NAME_LEN entries and requires each name to be\nNUL-terminated.\n\ngud_connector_add_tv_mode() currently passes each fixed-size entry\ndirectly to drm_mode_create_tv_properties_legacy(), which eventually\nreaches drm_property_add_enum() and strlen(). If a device returns an\nentry without a terminating NUL byte, strlen() reads past the end of\nthe slot and can run beyond the allocated buffer, triggering an\nout-of-bounds read.\n\nValidate that each returned TV mode name contains a NUL terminator\nwithin its fixed-size slot before passing it to the DRM property code.\nIf a malformed entry is found, reject the device response with -EIO.\n\nThis fixes the out-of-bounds read without changing the handling of\nvalid devices, and avoids silently truncating malformed protocol data.","publishedAt":"2026-09-24T15:33:31.617Z","updatedAt":"2026-10-19T09:07:45.893Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"676f1fb3632bbc9ce83be7938e93fe6bfc9510fd","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"06fcaf21c18ac88f57fee3803554f48c6026b95f","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"082e378886547b5b1c4075ed307f7c68547868dc","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"70cffc31a380b3eae45027101647aa94c242aa0e","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"72a95df6bbc7d20c7af1e39d86b3e910cccd01ad","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"eab46d9629807db1b5647d17227e16110a18227f","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"da1ea35fea67ad841f4ada28dd61b41be65e5437","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_connector.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_connector.c"]}],"references":["https://git.kernel.org/stable/c/676f1fb3632bbc9ce83be7938e93fe6bfc9510fd","https://git.kernel.org/stable/c/06fcaf21c18ac88f57fee3803554f48c6026b95f","https://git.kernel.org/stable/c/082e378886547b5b1c4075ed307f7c68547868dc","https://git.kernel.org/stable/c/70cffc31a380b3eae45027101647aa94c242aa0e","https://git.kernel.org/stable/c/72a95df6bbc7d20c7af1e39d86b3e910cccd01ad","https://git.kernel.org/stable/c/eab46d9629807db1b5647d17227e16110a18227f","https://git.kernel.org/stable/c/da1ea35fea67ad841f4ada28dd61b41be65e5437"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93234.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93234","state":"PUBLISHED","datePublished":"2026-09-24T15:33:31.617Z","dateUpdated":"2026-10-19T09:07:45.893Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.095Z"},"containers":{"cna":{"title":"drm/gud: validate TV mode names before creating enum property","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: validate TV mode names before creating enum property\n\nThe GUD protocol returns TV mode names as fixed-size\nGUD_CONNECTOR_TV_MODE_NAME_LEN entries and requires each name to be\nNUL-terminated.\n\ngud_connector_add_tv_mode() currently passes each fixed-size entry\ndirectly to drm_mode_create_tv_properties_legacy(), which eventually\nreaches drm_property_add_enum() and strlen(). If a device returns an\nentry without a terminating NUL byte, strlen() reads past the end of\nthe slot and can run beyond the allocated buffer, triggering an\nout-of-bounds read.\n\nValidate that each returned TV mode name contains a NUL terminator\nwithin its fixed-size slot before passing it to the DRM property code.\nIf a malformed entry is found, reject the device response with -EIO.\n\nThis fixes the out-of-bounds read without changing the handling of\nvalid devices, and avoids silently truncating malformed protocol data."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"676f1fb3632bbc9ce83be7938e93fe6bfc9510fd","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"06fcaf21c18ac88f57fee3803554f48c6026b95f","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"082e378886547b5b1c4075ed307f7c68547868dc","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"70cffc31a380b3eae45027101647aa94c242aa0e","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"72a95df6bbc7d20c7af1e39d86b3e910cccd01ad","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"eab46d9629807db1b5647d17227e16110a18227f","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","status":"affected","lessThan":"da1ea35fea67ad841f4ada28dd61b41be65e5437","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_connector.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_connector.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/676f1fb3632bbc9ce83be7938e93fe6bfc9510fd"},{"url":"https://git.kernel.org/stable/c/06fcaf21c18ac88f57fee3803554f48c6026b95f"},{"url":"https://git.kernel.org/stable/c/082e378886547b5b1c4075ed307f7c68547868dc"},{"url":"https://git.kernel.org/stable/c/70cffc31a380b3eae45027101647aa94c242aa0e"},{"url":"https://git.kernel.org/stable/c/72a95df6bbc7d20c7af1e39d86b3e910cccd01ad"},{"url":"https://git.kernel.org/stable/c/eab46d9629807db1b5647d17227e16110a18227f"},{"url":"https://git.kernel.org/stable/c/da1ea35fea67ad841f4ada28dd61b41be65e5437"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:07:45.893Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}