{"id":"CVE-2021-31572","aliases":["EUVD-2021-18466","GHSA-rc5m-cw2g-xxwh"],"status":"published","title":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer...","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.","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":"2026-11-11","score":0.01534,"percentile":0.75144,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2021-04-22T17:56:35Z","modified":"2026-06-17T03:52:01Z","products":[{"vendor":"amazon","product":"freertos"}],"references":[{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/commit/d05b9c123f2bf9090bce386a244fc934ae44db5b","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31572"},{"url":"https://github.com/FreeRTOS/FreeRTOS-Kernel/commit/c7a9a01c94987082b223d3e59969ede64363da63"},{"url":"https://github.com/advisories/GHSA-rc5m-cw2g-xxwh"}],"sources":{"cve":[{"id":"CVE-2021-31572","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.","status":"published","published":"2021-04-22T17:56:35Z","modified":"2024-08-03T23:03:33.364Z","updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-18466","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.","status":"published","published":"2021-04-22T17:56:35Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.423371Z"}],"ghsa":[{"id":"GHSA-rc5m-cw2g-xxwh","title":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer...","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.","status":"published","published":"2022-05-24T17:48:09Z","modified":"2023-01-29T05:06:26Z","cwes":["CWE-190"],"updated_at":"2026-11-02T14:46:01.439998Z"}],"nvd":[{"id":"CVE-2021-31572","description":"The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.","status":"published","published":"2021-04-22T18:15:08.547Z","modified":"2026-06-17T03:52:01.017Z","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-190"],"updated_at":"2026-11-02T14:06:52.03307Z"}]}}