{"id":"CVE-2026-23208","title":"ALSA: usb-audio: Prevent excessive number of frames","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 02c56650f3c118d3752122996d96173d26bb13aa < 480a1490c595a242f27493a4544b3efb21b29f6a","Linux >= 5ef30e443e6d3654cccecec99cf481a69a0a6d3b < ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41","Linux >= 99703c921864a318e3e8aae74fde071b1ff35bea < 282aba56713bbc58155716b55ca7222b2d9cf3c8","Linux >= 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf < c4dc012b027c9eb101583011089dea14d744e314","Linux >= aba41867dd66939d336fdf604e4d73b805d8039f < e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360","Linux >= d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 < d67dde02049e632ba58d3c44a164a74b6a737154","Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 152fc4f7b4a8af1c0418d2722f3b2729799cc837","Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 81e4b0009f2acc841d77a24fd796528b0bf62c4e","Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 62932d9ed639a9fa71b4ac1a56766a4b43abb7e4","Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < ef5749ef8b307bf8717945701b1b79d036af0a15","Linux >= 4.4.229 < 4.4.230","Linux >= 4.9.229 < 4.9.230","Linux >= 4.14.186 < 4.14.188","Linux >= 4.19.130 < 4.19.132","Linux >= 5.4.49 < 5.4.51","Linux >= 5.7.6 < 5.7.8","Linux 5.8"],"published":"2026-02-14","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:38:57.202Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23208","references":[{"url":"https://git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a"},{"url":"https://git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41"},{"url":"https://git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8"},{"url":"https://git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314"},{"url":"https://git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360"},{"url":"https://git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154"},{"url":"https://git.kernel.org/stable/c/152fc4f7b4a8af1c0418d2722f3b2729799cc837"},{"url":"https://git.kernel.org/stable/c/81e4b0009f2acc841d77a24fd796528b0bf62c4e"},{"url":"https://git.kernel.org/stable/c/62932d9ed639a9fa71b4ac1a56766a4b43abb7e4"},{"url":"https://git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15"}],"tags":["cve.org"],"epss":0.00186,"epssPercentile":0.0811,"ingestedAt":"2026-10-21T12:48:53.670Z","slug":"CVE-2026-23208","body":"## Overview\n\nIn 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\n\n## Affected\n\n- `Linux >= 02c56650f3c118d3752122996d96173d26bb13aa < 480a1490c595a242f27493a4544b3efb21b29f6a`\n- `Linux >= 5ef30e443e6d3654cccecec99cf481a69a0a6d3b < ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41`\n- `Linux >= 99703c921864a318e3e8aae74fde071b1ff35bea < 282aba56713bbc58155716b55ca7222b2d9cf3c8`\n- `Linux >= 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf < c4dc012b027c9eb101583011089dea14d744e314`\n- `Linux >= aba41867dd66939d336fdf604e4d73b805d8039f < e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360`\n- `Linux >= d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 < d67dde02049e632ba58d3c44a164a74b6a737154`\n- `Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 152fc4f7b4a8af1c0418d2722f3b2729799cc837`\n- `Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 81e4b0009f2acc841d77a24fd796528b0bf62c4e`\n- `Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < 62932d9ed639a9fa71b4ac1a56766a4b43abb7e4`\n- `Linux >= f0bd62b64016508938df9babe47f65c2c727d25c < ef5749ef8b307bf8717945701b1b79d036af0a15`\n- `Linux >= 4.4.229 < 4.4.230`\n- `Linux >= 4.9.229 < 4.9.230`\n- `Linux >= 4.14.186 < 4.14.188`\n- `Linux >= 4.19.130 < 4.19.132`\n- `Linux >= 5.4.49 < 5.4.51`\n- `Linux >= 5.7.6 < 5.7.8`\n- `Linux 5.8`\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":[]}