{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd"
            }
          ],
          "repo": "https://github.com/ash-project/ash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-33wq-x3q2-c92h"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82743.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.19.0"
          },
          {
            "fixed": "3.32.2"
          },
          {
            "introduced": "c48cb08026cf56b1ac33209203bc9c00061b40b8"
          },
          {
            "fixed": "0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "2.19.0"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "CPE_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "2.19.0"
          },
          {
            "fixed": "3.32.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "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.\n\nAsh.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.\n\nThis issue affects ash: from 2.19.0 before 3.32.2.",
  "id": "CVE-2026-82743",
  "modified": "2026-09-02T03:30:48.436760102Z",
  "published": "2026-09-01T03:37:24.292Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82743.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82743"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82743.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash/security/advisories/GHSA-33wq-x3q2-c92h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82743"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash/commit/0a5ecd2ffdfa848afdeb8827f02982ef2a63a1cd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads"
}