clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path (CVE-2026-89769) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89769

clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path

Answer in brief

CVE-2026-89769 records a Unknown severity vulnerability in clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path. 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 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	>=bee33f22d7c30626e711b4900e3f460b6e0e104f <d53c29a89a15e56a1797f3ef249955e544782e04 \|\| >=bee33f22d7c30626e711b4900e3f460b6e0e104f <cdcd861123248e871c2ec2be968b0a1b2a5a34b0 \|\| >=bee33f22d7c30626e711b4900e3f460b6e0e104f <05520e035f8332c8e33f3011b5ca016fde61793d	d53c29a89a15e56a1797f3ef249955e544782e04, cdcd861123248e871c2ec2be968b0a1b2a5a34b0, 05520e035f8332c8e33f3011b5ca016fde61793d
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d53c29a89a15e56a1797f3ef249955e544782e04 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path When cpuhp_setup_state fails after pit_clockevent_per_cpu_init has successfully called request_irq, the error handling jumps directly to out_pit_clocksource_unregister without freeing the registered IRQ. This leaks the IRQ line and, since kfree(pit) follows, leaves a dangling pointer registered as the interrupt handler's dev_id, potentially leading to a use-after-free if the IRQ fires afterwards. Fix it by calling pit_clockevent_per_cpu_exit to properly release the IRQ before falling through to the existing cleanup chain.

Quoted source text, attributed separately from HOL analysis.