{"id":"CVE-2026-23076","title":"ALSA: ctxfi: Fix potential OOB access in audio mixer handling","summary":"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'…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 6524205326e0c1a21263b5c14e48e14ef7e449ae","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < afca7ff5d5d4d63a1acb95461f55ca9a729feedf","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 8c1d09806e1441bc6a54b9a4f2818918046d5174","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < a8c42d11b0526a89192bd2f79facb4c60c8a1f38","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < d77ba72558cd66704f0fb7e0969f697e87c0f71c","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 873e2360d247eeee642878fcc3398babff7e387c","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 61006c540cbdedea83b05577dc7fb7fa18fe1276","Linux 2.6.31"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-10T20:42:28.584114Z"},"published":"2026-02-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:25:29.498Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23076","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"}],"tags":["cve.org"],"epss":0.00148,"epssPercentile":0.03591,"ingestedAt":"2026-10-19T18:35:50.107Z","slug":"CVE-2026-23076","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 6524205326e0c1a21263b5c14e48e14ef7e449ae`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < afca7ff5d5d4d63a1acb95461f55ca9a729feedf`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 8c1d09806e1441bc6a54b9a4f2818918046d5174`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < a8c42d11b0526a89192bd2f79facb4c60c8a1f38`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < d77ba72558cd66704f0fb7e0969f697e87c0f71c`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 873e2360d247eeee642878fcc3398babff7e387c`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 61006c540cbdedea83b05577dc7fb7fa18fe1276`\n- `Linux 2.6.31`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}