ALSA: usb-audio: caiaq: validate EP1 reply lengths
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: caiaq: validate EP1 reply lengths usb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then reads command-specific fixed items from the same URB buffer. Several paths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that urb->actual_length contains those bytes. Add per-command length checks, use a payload length derived from the bytes after the command byte for the control-state copy, and reject short analog input payloads before the input helper reads fixed offsets from the EP1 reply.
CVE-2026-93808
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-2026-93808
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": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "91acd231f219452fa58285239f83945accad9513",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "7cc6b3745a0cea697c8d0684b3094f220281a08d",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "add9328c91c195c494cd68a21b19e5e47a20d784",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "319393151367e6626affedcdd4f7b7b0286f4246",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "af8a172c4f71ac30d625f2966d2389a7fa872819",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "74f3c639f64fa5da4e1613149798b5089bce2807",
"versionType": "git"
},
{
"status": "affected",
"version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
"lessThan": "aba30af07d4fe499b50209801eba9da8a815522f",
"versionType": "git"
}
],
"programFiles": [
"sound/usb/caiaq/device.c",
"sound/usb/caiaq/input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.22",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/caiaq/device.c",
"sound/usb/caiaq/input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93808
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #8283 · Revision 1
- Added to Heist Feed
- Publisher date