Answer in brief
CVE-2026-23208 records a Unknown severity vulnerability in ALSA: usb-audio: Prevent excessive number of frames. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=02c56650f3c118d3752122996d96173d26bb13aa <480a1490c595a242f27493a4544b3efb21b29f6a || >=5ef30e443e6d3654cccecec99cf481a69a0a6d3b <ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41 || >=99703c921864a318e3e8aae74fde071b1ff35bea <282aba56713bbc58155716b55ca7222b2d9cf3c8 || >=2d50acd7dbd0682a56968ad9551341d7fc5b6eaf <c4dc012b027c9eb101583011089dea14d744e314 || >=aba41867dd66939d336fdf604e4d73b805d8039f <e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360 || >=d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 <d67dde02049e632ba58d3c44a164a74b6a737154 || >=f0bd62b64016508938df9babe47f65c2c727d25c <152fc4f7b4a8af1c0418d2722f3b2729799cc837 || >=f0bd62b64016508938df9babe47f65c2c727d25c <81e4b0009f2acc841d77a24fd796528b0bf62c4e || >=f0bd62b64016508938df9babe47f65c2c727d25c <62932d9ed639a9fa71b4ac1a56766a4b43abb7e4 || >=f0bd62b64016508938df9babe47f65c2c727d25c <ef5749ef8b307bf8717945701b1b79d036af0a15 || >=4.4.229 <4.4.230 || >=4.9.229 <4.9.230 || >=4.14.186 <4.14.188 || >=4.19.130 <4.19.132 || >=5.4.49 <5.4.51 || >=5.7.6 <5.7.8 | 480a1490c595a242f27493a4544b3efb21b29f6a, ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41, 282aba56713bbc58155716b55ca7222b2d9cf3c8, c4dc012b027c9eb101583011089dea14d744e314, e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360, d67dde02049e632ba58d3c44a164a74b6a737154, 152fc4f7b4a8af1c0418d2722f3b2729799cc837, 81e4b0009f2acc841d77a24fd796528b0bf62c4e, 62932d9ed639a9fa71b4ac1a56766a4b43abb7e4, ef5749ef8b307bf8717945701b1b79d036af0a15, 4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8 |
| Linux/Linuxgeneric | 5.8 | Not reported |
Published upstream
Feb 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 21, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Prevent excessive number of frames In this case, the user constructed the parameters with maxpacksize 40 for rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer size for each data URB is maxpacksize * packets, which in this example is 40 * 6 = 240; When the user performs a write operation to send audio data into the ALSA PCM playback stream, the calculated number of frames is packsize[0] * packets = 264, which exceeds the allocated URB buffer size, triggering the out-of-bounds (OOB) issue reported by syzbot [1]. Added a check for the number of single data URB frames when calculating the number of frames to prevent [1]. [1] BUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 Write of size 264 at addr ffff88804337e800 by task syz.0.17/5506 Call Trace: copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611 prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333
Quoted source text, attributed separately from HOL analysis.