usb: gadget: f_midi2: fix use-after-free in string attribute show path (CVE-2026-90022) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90022

usb: gadget: f_midi2: fix use-after-free in string attribute show path

Answer in brief

CVE-2026-90022 records a Unknown severity vulnerability in usb: gadget: f_midi2: fix use-after-free in string attribute show path. The current sources do not mark it as known exploited. The current feed maps 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 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
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). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f9bdf4c4f6410a1dfafafa383a0e21069372657f \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d11f3300b39e2daad2f0d9d66ddcc39a156cb594 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e89e30f0b5d3004fe5955250bd8b04f3733e32ce \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49fab5e1bdb205c36c965d0e9677bc40d282d3a2 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b \|\| >=0 <6.6.157 \|\| >=0 <6.12.110 \|\| >=0 <6.18.51 \|\| >=0 <7.2.5	f9bdf4c4f6410a1dfafafa383a0e21069372657f, d11f3300b39e2daad2f0d9d66ddcc39a156cb594, e89e30f0b5d3004fe5955250bd8b04f3733e32ce, 49fab5e1bdb205c36c965d0e9677bc40d282d3a2, fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b, 6.6.157, 6.12.110, 6.18.51, 7.2.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to f9bdf4c4f6410a1dfafafa383a0e21069372657f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_midi2: fix use-after-free in string attribute show path f_midi2_opts_str_show() takes the string lock internally, but its callers dereference the opts->info.<field> pointer before calling it, outside the lock. This races with f_midi2_opts_str_store(), which frees the old string under opts->lock when the attribute is written concurrently, the show path can read a pointer that gets freed before the lock inside str_show() is even taken. Change f_midi2_opts_str_show() to take a pointer to the string field, matching the existing pattern in f_midi2_opts_str_store(), and dereference it only after the lock is held. Update all three callers (iface_name, block name, and the EP string option macro) accordingly.

Quoted source text, attributed separately from HOL analysis.