USB: gadget: ffs: fix mm lifetime handling

Answer in brief

CVE-2026-90045 records a Unknown severity vulnerability in USB: gadget: ffs: fix mm lifetime handling. 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 <f3d31484b3f26d63c09e5569ebfaa1079a17f171 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7411de0ce3b45286de1de82526795658ea6eacb0 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8 \|\| >=0 <6.18.51 \|\| >=0 <7.2.5	f3d31484b3f26d63c09e5569ebfaa1079a17f171, 7411de0ce3b45286de1de82526795658ea6eacb0, 5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8, 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 f3d31484b3f26d63c09e5569ebfaa1079a17f171 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: ffs: fix mm lifetime handling io_data stores a pointer to the submitting task's mm_struct, but does not currently hold a reference to it while async requests are pending. This can result in a use-after-free if the task exits before completion handling finishes. Take a reference with mmgrab() when queuing the read request and release it with mmdrop() on request completion.

Quoted source text, attributed separately from HOL analysis.