{"id":"CVE-2020-16273","aliases":["EUVD-2020-8234","GHSA-4j52-x36j-w2jw"],"status":"published","title":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism...","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00345,"percentile":0.28326,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-191"],"published":"2020-11-12T18:53:45Z","modified":"2026-06-17T02:57:58Z","products":[{"vendor":"arm","product":"armv8-m_firmware"}],"references":[{"url":"https://developer.arm.com/support/arm-security-updates/armv8-m-stack-sealing","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-16273"},{"url":"https://github.com/advisories/GHSA-4j52-x36j-w2jw"}],"sources":{"cve":[{"id":"CVE-2020-16273","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","status":"published","published":"2020-11-12T18:53:45Z","modified":"2024-08-04T13:37:54.222Z","updated_at":"2026-11-02T14:35:59.116379Z"}],"euvd":[{"id":"EUVD-2020-8234","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","status":"published","published":"2020-11-12T18:53:45Z","modified":"2024-08-04T13:37:54Z","updated_at":"2026-11-03T03:07:28.673063Z"}],"ghsa":[{"id":"GHSA-4j52-x36j-w2jw","title":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism...","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","status":"published","published":"2022-05-24T17:33:38Z","modified":"2023-01-29T05:05:16Z","cwes":["CWE-191"],"updated_at":"2026-11-02T14:45:44.97547Z"}],"nvd":[{"id":"CVE-2020-16273","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","status":"published","published":"2020-11-12T19:15:14.583Z","modified":"2026-06-17T02:57:58.787Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:06:24.137599Z"}]}}