serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ (CVE-2026-74652) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-74652

serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ

Answer in brief

CVE-2026-74652 records a Unknown severity vulnerability in serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ. 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 Aug 22, 2026Updated Aug 22, 2026Source checked Aug 22, 2026First seen by HOL Aug 22, 2026Material review Aug 22, 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	>=2c1fd53af21b8cb13878b054894d33d3383eb1f3 <759ead98a39fb625be302f9aa66290985dcaa325 \|\| >=2c1fd53af21b8cb13878b054894d33d3383eb1f3 <e57f0aa5c35be37218ba0e4887b241584dd4b2d2 \|\| >=2c1fd53af21b8cb13878b054894d33d3383eb1f3 <36672c8d7d14e9c43287528455d2c97b526ea6ad	759ead98a39fb625be302f9aa66290985dcaa325, e57f0aa5c35be37218ba0e4887b241584dd4b2d2, 36672c8d7d14e9c43287528455d2c97b526ea6ad
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 759ead98a39fb625be302f9aa66290985dcaa325 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 22, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: serial: amba-pl011: cancel RS485 hrtimers after freeing IRQ The RS485 trigger hrtimers are embedded in the devm-managed port and can fire after it is freed. The IRQ handler can arm a timer, so free the IRQ first and then cancel both timers. Complete the RS485 stop without arming a timer, and cancel the timers in remove() for the suspend-then-unbind path, where shutdown is not called. This issue was found by an in-house static analysis tool.

Quoted source text, attributed separately from HOL analysis.