Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads (CVE-2026-82743) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-82743

Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads

Answer in brief

CVE-2026-82743 records a Unknown severity vulnerability in Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads. The current sources do not mark it as known exploited. The current feed maps ash-project/ash (generic), ash-project/ash (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 1, 2026Updated Sep 1, 2026Source checked Sep 1, 2026First seen by HOL Sep 1, 2026Material review Sep 1, 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 ash-project/ash (generic), ash-project/ash (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ash-project/ashgeneric	>=2.19.0 <3.32.2	3.32.2
ash-project/ashgeneric	>=c48cb08026cf56b1ac33209203bc9c00061b40b8 <0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd	0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd

Recommended response

Check inventory. Check lockfiles and deployed manifests for ash-project/ash, ash-project/ash.
Review the reported fix. Update ash-project/ash to 3.32.2; ash-project/ash to 0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 1, 2026

Sources and claim methodology

Upstream source description

Uncontrolled Resource Consumption vulnerability in ash-project ash lets a slow asynchronous read spin a scheduler thread at full CPU while the framework waits for it. Ash.Actions.Read.AsyncLimiter.await_at_least_one/1 (lib/ash/actions/read/async_limiter.ex) waited for concurrent async read tasks by polling each with Task.yield(task, 0) in a tight loop rather than blocking. While every outstanding task is still running (a slow related-data load or calculation), the loop returns immediately and repeats, busy-spinning and holding a BEAM scheduler at full CPU for the whole duration of the slow read; concurrent slow reads tie up further schedulers. The fix waits with Task.yield_many (a non-blocking sweep followed by a blocking wait with timeout: :infinity), so the process sleeps until a task completes instead of spinning. This issue affects ash: from 2.19.0 before 3.32.2.

Quoted source text, attributed separately from HOL analysis.