ALSA: usb-audio: caiaq: validate EP1 reply lengths
Summary
| CVE | CVE-2026-93808 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 17:17:13 UTC |
| Updated | 2026-10-03 11:17:50 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.060190000 (date 2026-10-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c 91acd231f219452fa58285239f83945accad9513 git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c 7cc6b3745a0cea697c8d0684b3094f220281a08d git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c add9328c91c195c494cd68a21b19e5e47a20d784 git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c 319393151367e6626affedcdd4f7b7b0286f4246 git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c af8a172c4f71ac30d625f2966d2389a7fa872819 git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c 74f3c639f64fa5da4e1613149798b5089bce2807 git | Not specified |
| CNA | Linux | Linux | affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c aba30af07d4fe499b50209801eba9da8a815522f git | Not specified |
| CNA | Linux | Linux | affected 2.6.22 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.22 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.271 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/91acd231f219452fa58285239f83945accad9513 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.