{"id":"CVE-2026-46088","state":"PUBLISHED","title":"ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()\n\nsnd_ctl_elem_init_enum_names() advances pointer p through the names\nbuffer while decrementing buf_len. If buf_len reaches zero but items\nremain, the next iteration calls strnlen(p, 0).\n\nWhile strnlen(p, 0) returns 0 and would hit the existing name_len == 0\nerror path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks\nmaxlen against __builtin_dynamic_object_size(). When Clang loses track\nof p's object size inside the loop, this triggers a BRK exception panic\nbefore the return value is examined.\n\nAdd a buf_len == 0 guard at the loop entry to prevent calling fortified\nstrnlen() on an exhausted buffer.\n\nFound by kernel fuzz testing through Xiaomi Smartphone.","publishedAt":"2026-05-27T12:58:31.895Z","updatedAt":"2026-10-15T01:20:25.966Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"708f6ec9bcdf58bfd561409110baaf4fd3be4ea3","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"bfcbb4994da9e979c4bcfcf24aaaac69e457e48e","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"a470f7cabc4df72d9bd132f5719a8717292bb440","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"654c818a69c21d2bea4e8fd9eae7da865df9a5c8","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"82012fd3e78a14360fbc2f1a7491589896704f97","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"e0da8a8cac74f4b9f577979d131f0d2b88a84487","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/control.c"]}],"references":["https://git.kernel.org/stable/c/708f6ec9bcdf58bfd561409110baaf4fd3be4ea3","https://git.kernel.org/stable/c/bfcbb4994da9e979c4bcfcf24aaaac69e457e48e","https://git.kernel.org/stable/c/a470f7cabc4df72d9bd132f5719a8717292bb440","https://git.kernel.org/stable/c/1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0","https://git.kernel.org/stable/c/8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e","https://git.kernel.org/stable/c/654c818a69c21d2bea4e8fd9eae7da865df9a5c8","https://git.kernel.org/stable/c/82012fd3e78a14360fbc2f1a7491589896704f97","https://git.kernel.org/stable/c/e0da8a8cac74f4b9f577979d131f0d2b88a84487","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46088.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46088","state":"PUBLISHED","datePublished":"2026-05-27T12:58:31.895Z","dateUpdated":"2026-10-15T01:20:25.966Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.096Z"},"containers":{"cna":{"title":"ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()\n\nsnd_ctl_elem_init_enum_names() advances pointer p through the names\nbuffer while decrementing buf_len. If buf_len reaches zero but items\nremain, the next iteration calls strnlen(p, 0).\n\nWhile strnlen(p, 0) returns 0 and would hit the existing name_len == 0\nerror path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks\nmaxlen against __builtin_dynamic_object_size(). When Clang loses track\nof p's object size inside the loop, this triggers a BRK exception panic\nbefore the return value is examined.\n\nAdd a buf_len == 0 guard at the loop entry to prevent calling fortified\nstrnlen() on an exhausted buffer.\n\nFound by kernel fuzz testing through Xiaomi Smartphone."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"708f6ec9bcdf58bfd561409110baaf4fd3be4ea3","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"bfcbb4994da9e979c4bcfcf24aaaac69e457e48e","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"a470f7cabc4df72d9bd132f5719a8717292bb440","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"654c818a69c21d2bea4e8fd9eae7da865df9a5c8","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"82012fd3e78a14360fbc2f1a7491589896704f97","versionType":"git"},{"version":"8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4","status":"affected","lessThan":"e0da8a8cac74f4b9f577979d131f0d2b88a84487","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/core/control.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/708f6ec9bcdf58bfd561409110baaf4fd3be4ea3"},{"url":"https://git.kernel.org/stable/c/bfcbb4994da9e979c4bcfcf24aaaac69e457e48e"},{"url":"https://git.kernel.org/stable/c/a470f7cabc4df72d9bd132f5719a8717292bb440"},{"url":"https://git.kernel.org/stable/c/1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0"},{"url":"https://git.kernel.org/stable/c/8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e"},{"url":"https://git.kernel.org/stable/c/654c818a69c21d2bea4e8fd9eae7da865df9a5c8"},{"url":"https://git.kernel.org/stable/c/82012fd3e78a14360fbc2f1a7491589896704f97"},{"url":"https://git.kernel.org/stable/c/e0da8a8cac74f4b9f577979d131f0d2b88a84487"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:53:28.015Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - 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