{"id":"CVE-2021-32020","aliases":["EUVD-2021-18887","GHSA-8pwj-qgrj-p95h"],"status":"published","title":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during...","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01303,"percentile":0.70734,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2021-05-03T21:12:44Z","modified":"2026-06-17T03:52:41Z","products":[{"vendor":"amazon","product":"freertos"}],"references":[{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/commit/c7a9a01c94987082b223d3e59969ede64363da63","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32020"},{"url":"https://github.com/advisories/GHSA-8pwj-qgrj-p95h"}],"sources":{"cve":[{"id":"CVE-2021-32020","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.","status":"published","published":"2021-05-03T21:12:44Z","modified":"2024-08-03T23:17:28.528Z","updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-18887","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.","status":"published","published":"2021-05-03T21:12:44Z","modified":"2024-08-03T23:17:28Z","updated_at":"2026-11-03T03:24:37.407491Z"}],"ghsa":[{"id":"GHSA-8pwj-qgrj-p95h","title":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during...","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.","status":"published","published":"2022-05-24T17:49:26Z","modified":"2023-01-29T05:07:29Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:46:10.663769Z"}],"nvd":[{"id":"CVE-2021-32020","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.","status":"published","published":"2021-05-03T22:15:08.697Z","modified":"2026-06-17T03:52:41.34Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}