Input: byd - synchronize timer deletion before freeing private data
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: byd - synchronize timer deletion before freeing private data byd_disconnect() uses timer_delete() before freeing the driver's private data. This does not wait for a running byd_clear_touch() callback, which dereferences the private data and its psmouse pointer. A callback racing with disconnect can therefore access the private data after it has been freed. The timer can also still be re-armed by byd_process_byte() while the disconnect is in progress. Use timer_shutdown_sync() before freeing the private data: it waits for a running callback and turns any later re-arm attempt into a no-op.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.185, 6.6.154, 6.12.106, 6.18.46, 7.1.10, 7.2
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 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-80572
- 2026-10-03 Alias added: GHSA-g6j6-j6hv-j2v2
- 2026-10-18 CISA SSVC decision points changed
- 2026-10-30 Fix available: Linux/[email protected], Linux/[email protected], Linux/Linux@b4d74810aad9b29c313b4d7880c84aceb5abe488 +1 · CNA
- 2026-10-30 2 new references · CNA
References
Other 8
- https://git.kernel.org/stable/c/fe2785d5513b3254368a1f0831515fc59ab0d40d
- https://git.kernel.org/stable/c/b4d74810aad9b29c313b4d7880c84aceb5abe488
- https://git.kernel.org/stable/c/84b205297fa15f97510342221d8c9a0119711478
- https://git.kernel.org/stable/c/28d984a66b9e14be74986167b6ad40b5e0daf19a
- https://git.kernel.org/stable/c/ee944a706a18322b4a2599eebe8040a2994e928f
- https://git.kernel.org/stable/c/8dbfd8e32a13e116790780ed0be82b5a05eb9916
- https://git.kernel.org/stable/c/2e509ef60ee41a2da0deb062c262bb530143fb37
- https://git.kernel.org/stable/c/c83e79c0842ed29860648bcce5022ef0ba5001c6
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Sources
- CVE-2026-80572 · CVE Program
- CVE-2026-80572 · NVD
- FIRST EPSS
- GHSA-g6j6-j6hv-j2v2 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-80572 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences