Low severity · published Sep 1, 2026
CVE-2026-82743
Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads
2.1
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
ash · ash-project
2.19.0 before 3.32.2; c48cb08026cf56b1ac33209203bc9c00061b40b8 before 0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd · source: vendor
Affected product
AS
ash
ash-project
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