usb: storage: realtek_cr: fix use-after-free on disconnect
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 6 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.224, 6.1.191, 6.6.160, 6.12.112, 6.18.51, 7.2.5, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90029
- 2026-10-03 Alias added: GHSA-m7jg-4wjg-p9fx
- 2026-10-03 Fix available: Linux/Linux@524d4257f741cd95eb85e2817c9c890928fcfef7, Linux/[email protected] · CNA
- 2026-10-03 1 new reference · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@c1e7e35100efffba7c9e1dfa76519d6cd323ba3d · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/Linux@0935e57ede003bbe35de9c5d6a49260999ca0314, Linux/[email protected], Linux/[email protected] +1 · CNA
- 2026-10-30 2 new references · CNA
- 2026-11-01 Affected versions changed · Red Hat
- 2026-11-01 CVSS score added · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/f98c2f119fcd81cfede114d2fd3463a17aed8209
- https://git.kernel.org/stable/c/0935e57ede003bbe35de9c5d6a49260999ca0314
- https://git.kernel.org/stable/c/c1e7e35100efffba7c9e1dfa76519d6cd323ba3d
- https://git.kernel.org/stable/c/524d4257f741cd95eb85e2817c9c890928fcfef7
- https://git.kernel.org/stable/c/7c4e2f964c65dea4ea22386799d5fb10ef1e3e54
- https://git.kernel.org/stable/c/cae9dbba6adae21a04a3bd045e07b489847ff2c6
- https://git.kernel.org/stable/c/4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc
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Sources
- CVE-2026-90029 · CVE Program
- CVE-2026-90029 · NVD
- FIRST EPSS
- GHSA-m7jg-4wjg-p9fx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90029 · Red Hat security data · CC BY 4.0
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