{"id":"CVE-2026-23089","summary":"ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()\n\nWhen snd_usb_create_mixer() fails, snd_usb_mixer_free() frees\nmixer-\u003eid_elems but the controls already added to the card still\nreference the freed memory. Later when snd_card_register() runs,\nthe OSS mixer layer calls their callbacks and hits a use-after-free read.\n\nCall trace:\n  get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411\n  get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241\n  mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381\n  snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887\n  ...\n  snd_card_register+0x4ed/0x6d0 sound/core/init.c:923\n  usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025\n\nFix by calling snd_ctl_remove() for all mixer controls before freeing\nid_elems. We save the next pointer first because snd_ctl_remove()\nfrees the current element.","modified":"2026-04-02T17:30:07.047341Z","published":"2026-02-04T16:08:12.575Z","related":["SUSE-SU-2026:0617-1","SUSE-SU-2026:0928-1","SUSE-SU-2026:0961-1","SUSE-SU-2026:0962-1","SUSE-SU-2026:1003-1","SUSE-SU-2026:1041-1","SUSE-SU-2026:1077-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:1130-1","SUSE-SU-2026:1131-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23089.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23089.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23089"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6639b6c2367f884ca172b78d69f7da17bfab2e5e"},{"fixed":"51b1aa6fe7dc87356ba58df06afb9677c9b841ea"},{"fixed":"56fb6efd5d04caf6f14994d51ec85393b9a896c6"},{"fixed":"7009daeefa945973a530b2f605fe445fc03747af"},{"fixed":"7bff0156d13f0ad9436e5178b979b063d59f572a"},{"fixed":"e6f103a22b08daf5df2f4aa158081840e5910963"},{"fixed":"dc1a5dd80af1ee1f29d8375b12dd7625f6294dad"},{"fixed":"930e69757b74c3ae083b0c3c7419bfe7f0edc7b2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23089.json"}}],"schema_version":"1.7.5"}