ALSA: usb-audio: Prevent excessive number of frames
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
CVE-2026-23208
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-23208
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "02c56650f3c118d3752122996d96173d26bb13aa",
"lessThan": "480a1490c595a242f27493a4544b3efb21b29f6a",
"versionType": "git"
},
{
"status": "affected",
"version": "5ef30e443e6d3654cccecec99cf481a69a0a6d3b",
"lessThan": "ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41",
"versionType": "git"
},
{
"status": "affected",
"version": "99703c921864a318e3e8aae74fde071b1ff35bea",
"lessThan": "282aba56713bbc58155716b55ca7222b2d9cf3c8",
"versionType": "git"
},
{
"status": "affected",
"version": "2d50acd7dbd0682a56968ad9551341d7fc5b6eaf",
"lessThan": "c4dc012b027c9eb101583011089dea14d744e314",
"versionType": "git"
},
{
"status": "affected",
"version": "aba41867dd66939d336fdf604e4d73b805d8039f",
"lessThan": "e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360",
"versionType": "git"
},
{
"status": "affected",
"version": "d288dc74f8cf95cb7ae0aaf245b7128627a49bf3",
"lessThan": "d67dde02049e632ba58d3c44a164a74b6a737154",
"versionType": "git"
},
{
"status": "affected",
"version": "f0bd62b64016508938df9babe47f65c2c727d25c",
"lessThan": "152fc4f7b4a8af1c0418d2722f3b2729799cc837",
"versionType": "git"
},
{
"status": "affected",
"version": "f0bd62b64016508938df9babe47f65c2c727d25c",
"lessThan": "81e4b0009f2acc841d77a24fd796528b0bf62c4e",
"versionType": "git"
},
{
"status": "affected",
"version": "f0bd62b64016508938df9babe47f65c2c727d25c",
"lessThan": "62932d9ed639a9fa71b4ac1a56766a4b43abb7e4",
"versionType": "git"
},
{
"status": "affected",
"version": "f0bd62b64016508938df9babe47f65c2c727d25c",
"lessThan": "ef5749ef8b307bf8717945701b1b79d036af0a15",
"versionType": "git"
},
{
"status": "affected",
"version": "4.4.229",
"lessThan": "4.4.230",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.229",
"lessThan": "4.9.230",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.186",
"lessThan": "4.14.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.130",
"lessThan": "4.19.132",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.49",
"lessThan": "5.4.51",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.7.6",
"lessThan": "5.7.8",
"versionType": "semver"
}
],
"programFiles": [
"sound/usb/pcm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.4.230",
"versionType": "semver",
"lessThanOrEqual": "4.4.*"
},
{
"status": "unaffected",
"version": "4.9.230",
"versionType": "semver",
"lessThanOrEqual": "4.9.*"
},
{
"status": "unaffected",
"version": "4.14.188",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.132",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.51",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.7.8",
"versionType": "semver",
"lessThanOrEqual": "5.7.*"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.10",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/pcm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23208
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46112 · Revision 1
- Added to Heist Feed
- Publisher date