{"id":"CVE-2021-22550","aliases":["EUVD-2021-9691","GHSA-3rwv-g3jc-r7cc"],"status":"published","title":"Enclave memory overwrite/overread vulnerability in Asylo UntrustedCacheMalloc::GetBuffer","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00102,"percentile":0.00916,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-668","CWE-823"],"published":"2021-06-08T13:15:14Z","modified":"2026-10-20T14:23:28Z","products":[{"vendor":"google","product":"asylo"},{"vendor":"google llc","product":"asylo"}],"references":[{"url":"https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22550"},{"url":"https://github.com/advisories/GHSA-3rwv-g3jc-r7cc"}],"sources":{"cve":[{"id":"CVE-2021-22550","title":"Enclave memory overwrite/overread vulnerability in Asylo UntrustedCacheMalloc::GetBuffer","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","status":"published","published":"2021-06-08T13:15:14.762Z","modified":"2024-09-16T23:10:32.801Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-823"],"updated_at":"2026-11-02T14:32:58.028461Z"}],"euvd":[{"id":"EUVD-2021-9691","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","status":"published","published":"2021-06-08T13:15:14Z","modified":"2024-09-16T23:10:32Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-03T00:54:56.209754Z"}],"ghsa":[{"id":"GHSA-3rwv-g3jc-r7cc","title":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses...","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","status":"published","published":"2022-05-24T19:04:20Z","modified":"2023-01-29T05:06:56Z","cwes":["CWE-668"],"updated_at":"2026-11-02T14:46:07.317218Z"}],"nvd":[{"id":"CVE-2021-22550","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","status":"published","published":"2021-06-08T14:15:07.873Z","modified":"2026-06-17T03:37:25.147Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"medium","assessor":"secondary"},{"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":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-823","CWE-668"],"updated_at":"2026-11-02T14:06:54.439974Z"}],"osv":[{"id":"CVE-2021-22550","description":"An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c","status":"published","published":"2021-06-08T14:15:07.873Z","modified":"2026-10-20T14:23:28.09149229Z","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"}],"updated_at":"2026-11-02T15:44:18.367807Z"}]}}