usb: storage: realtek_cr: fix use-after-free on disconnect (CVE-2026-90029) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90029

usb: storage: realtek_cr: fix use-after-free on disconnect

Answer in brief

CVE-2026-90029 records a Unknown severity vulnerability in usb: storage: realtek_cr: fix use-after-free on disconnect. 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 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: 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	>=e931830bb877e2aad9a1be83506f9bdb26c91e4e <7c4e2f964c65dea4ea22386799d5fb10ef1e3e54 \|\| >=e931830bb877e2aad9a1be83506f9bdb26c91e4e <cae9dbba6adae21a04a3bd045e07b489847ff2c6 \|\| >=e931830bb877e2aad9a1be83506f9bdb26c91e4e <4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc	7c4e2f964c65dea4ea22386799d5fb10ef1e3e54, cae9dbba6adae21a04a3bd045e07b489847ff2c6, 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc
Linux/Linuxgeneric	3.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54 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: storage: realtek_cr: fix use-after-free on disconnect realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free. Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed. Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor. Found by static analysis.

Quoted source text, attributed separately from HOL analysis.