{"id":"CVE-2026-23076","state":"PUBLISHED","title":"ALSA: ctxfi: Fix potential OOB access in audio mixer handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Fix potential OOB access in audio mixer handling\n\nIn the audio mixer handling code of ctxfi driver, the conf field is\nused as a kind of loop index, and it's referred in the index callbacks\n(amixer_index() and sum_index()).\n\nAs spotted recently by fuzzers, the current code causes OOB access at\nthose functions.\n| UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48\n| index 8 is out of range for type 'unsigned char [8]'\n\nAfter the analysis, the cause was found to be the lack of the proper\n(re-)initialization of conj field.\n\nThis patch addresses those OOB accesses by adding the proper\ninitializations of the loop indices.","publishedAt":"2026-02-04T16:08:01.204Z","updatedAt":"2026-10-19T18:25:29.498Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"6524205326e0c1a21263b5c14e48e14ef7e449ae","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"afca7ff5d5d4d63a1acb95461f55ca9a729feedf","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"8c1d09806e1441bc6a54b9a4f2818918046d5174","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"a8c42d11b0526a89192bd2f79facb4c60c8a1f38","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"d77ba72558cd66704f0fb7e0969f697e87c0f71c","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"873e2360d247eeee642878fcc3398babff7e387c","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"61006c540cbdedea83b05577dc7fb7fa18fe1276","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/pci/ctxfi/ctamixer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/pci/ctxfi/ctamixer.c"]}],"references":["https://git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae","https://git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf","https://git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174","https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38","https://git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c","https://git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c","https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23076.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23076","state":"PUBLISHED","datePublished":"2026-02-04T16:08:01.204Z","dateUpdated":"2026-10-19T18:25:29.498Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.958Z"},"containers":{"cna":{"title":"ALSA: ctxfi: Fix potential OOB access in audio mixer handling","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Fix potential OOB access in audio mixer handling\n\nIn the audio mixer handling code of ctxfi driver, the conf field is\nused as a kind of loop index, and it's referred in the index callbacks\n(amixer_index() and sum_index()).\n\nAs spotted recently by fuzzers, the current code causes OOB access at\nthose functions.\n| UBSAN: array-index-out-of-bounds in /build/reproducible-path/linux-6.17.8/sound/pci/ctxfi/ctamixer.c:347:48\n| index 8 is out of range for type 'unsigned char [8]'\n\nAfter the analysis, the cause was found to be the lack of the proper\n(re-)initialization of conj field.\n\nThis patch addresses those OOB accesses by adding the proper\ninitializations of the loop indices."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"6524205326e0c1a21263b5c14e48e14ef7e449ae","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"afca7ff5d5d4d63a1acb95461f55ca9a729feedf","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"8c1d09806e1441bc6a54b9a4f2818918046d5174","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"a8c42d11b0526a89192bd2f79facb4c60c8a1f38","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"d77ba72558cd66704f0fb7e0969f697e87c0f71c","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"873e2360d247eeee642878fcc3398babff7e387c","versionType":"git"},{"version":"8cc72361481f00253f1e468ade5795427386d593","status":"affected","lessThan":"61006c540cbdedea83b05577dc7fb7fa18fe1276","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/pci/ctxfi/ctamixer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.249","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.199","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.162","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.122","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.68","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.8","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/pci/ctxfi/ctamixer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6524205326e0c1a21263b5c14e48e14ef7e449ae"},{"url":"https://git.kernel.org/stable/c/afca7ff5d5d4d63a1acb95461f55ca9a729feedf"},{"url":"https://git.kernel.org/stable/c/8c1d09806e1441bc6a54b9a4f2818918046d5174"},{"url":"https://git.kernel.org/stable/c/a8c42d11b0526a89192bd2f79facb4c60c8a1f38"},{"url":"https://git.kernel.org/stable/c/d77ba72558cd66704f0fb7e0969f697e87c0f71c"},{"url":"https://git.kernel.org/stable/c/873e2360d247eeee642878fcc3398babff7e387c"},{"url":"https://git.kernel.org/stable/c/61006c540cbdedea83b05577dc7fb7fa18fe1276"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:59:32.239Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.10.249"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.15.199"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-23076","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-06-10T20:42:28.584114Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T18:25:29.498Z"}}]}}}