ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf (CVE-2026-97930) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97930

ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf

Answer in brief

CVE-2026-97930 records a Unknown severity vulnerability in ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf. 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.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <229cab526580f82839ae8e4e379753c8cf16952e \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <381495b5b3da12d714e53d9d12d955b13fe26eac \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b5753bdfd909f7f095fb464d67802b5e52cbadbf \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <861111a14740e12c36d363e9830f8daa734279c9	229cab526580f82839ae8e4e379753c8cf16952e, 381495b5b3da12d714e53d9d12d955b13fe26eac, b5753bdfd909f7f095fb464d67802b5e52cbadbf, 861111a14740e12c36d363e9830f8daa734279c9
Linux/Linuxgeneric	2.6.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 229cab526580f82839ae8e4e379753c8cf16952e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf The in04_last array in struct usx2ydev is declared as char[24], but in04_buf is allocated as sizeof(struct us428_ctls) which is 21 bytes. In i_usx2y_in04_int(), when ctl_snapshot_last == -2 (initialization path): memcpy(usx2y->in04_last, usx2y->in04_buf, sizeof(usx2y->in04_last)); This copies 24 bytes from a 21-byte slab allocation, reading 3 bytes past the end of the source object. Introduce a USX2Y_IN04_SIZE constant defined as sizeof(struct us428_ctls) and use it consistently for the in04_last array, the in04_buf allocation, the URB transfer length, and the comparison loop, replacing the bare 24 and 21 literals throughout.

Quoted source text, attributed separately from HOL analysis.