{"id":"CVE-2026-23208","summary":"ALSA: usb-audio: Prevent excessive number of frames","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Prevent excessive number of frames\n\nIn this case, the user constructed the parameters with maxpacksize 40\nfor rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer\nsize for each data URB is maxpacksize * packets, which in this example\nis 40 * 6 = 240; When the user performs a write operation to send audio\ndata into the ALSA PCM playback stream, the calculated number of frames\nis packsize[0] * packets = 264, which exceeds the allocated URB buffer\nsize, triggering the out-of-bounds (OOB) issue reported by syzbot [1].\n\nAdded a check for the number of single data URB frames when calculating\nthe number of frames to prevent [1].\n\n[1]\nBUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\nWrite of size 264 at addr ffff88804337e800 by task syz.0.17/5506\nCall Trace:\n copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487\n prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611\n prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333","modified":"2026-05-18T05:57:39.380724018Z","published":"2026-02-14T16:27:30.441Z","related":["CGA-rq64-p29r-h44h","SUSE-SU-2026:0962-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:1081-1","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","SUSE-SU-2026:21284-1","openSUSE-SU-2026:20416-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23208.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/62932d9ed639a9fa71b4ac1a56766a4b43abb7e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23208.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23208"},{"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":"02c56650f3c118d3752122996d96173d26bb13aa"},{"fixed":"480a1490c595a242f27493a4544b3efb21b29f6a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5ef30e443e6d3654cccecec99cf481a69a0a6d3b"},{"fixed":"ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"99703c921864a318e3e8aae74fde071b1ff35bea"},{"fixed":"282aba56713bbc58155716b55ca7222b2d9cf3c8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2d50acd7dbd0682a56968ad9551341d7fc5b6eaf"},{"fixed":"c4dc012b027c9eb101583011089dea14d744e314"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"aba41867dd66939d336fdf604e4d73b805d8039f"},{"fixed":"e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d288dc74f8cf95cb7ae0aaf245b7128627a49bf3"},{"fixed":"d67dde02049e632ba58d3c44a164a74b6a737154"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f0bd62b64016508938df9babe47f65c2c727d25c"},{"fixed":"62932d9ed639a9fa71b4ac1a56766a4b43abb7e4"},{"fixed":"ef5749ef8b307bf8717945701b1b79d036af0a15"}]}],"versions":["v4.4.229","v4.9.229","v4.14.187","v4.14.186","v4.19.131","v4.19.130","v5.4.50","v5.4.49","v5.7.7","v5.7.6"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23208.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.230"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.5.0"},{"fixed":"4.9.230"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.10.0"},{"fixed":"4.14.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.132"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.7.8"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"fixed":"6.18.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23208.json"}}],"schema_version":"1.7.5"}