{"id":"CVE-2021-44421","aliases":["EUVD-2021-31262","GHSA-pj6m-jc6g-72c4"],"status":"published","title":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a...","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00436,"percentile":0.38315,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203"],"published":"2022-03-06T20:03:40Z","modified":"2026-10-20T10:55:06Z","products":[{"vendor":"occlum_project","product":"occlum"}],"references":[{"url":"https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/occlum/occlum/compare/0.25.0...v0.26.0","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44421"},{"url":"https://github.com/advisories/GHSA-pj6m-jc6g-72c4"}],"sources":{"cve":[{"id":"CVE-2021-44421","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","status":"published","published":"2022-03-06T20:03:40Z","modified":"2024-08-04T04:25:15.104Z","updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31262","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","status":"published","published":"2022-03-06T20:03:40Z","modified":"2024-08-04T04:25:15Z","updated_at":"2026-11-03T03:24:12.005069Z"}],"ghsa":[{"id":"GHSA-pj6m-jc6g-72c4","title":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a...","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","status":"published","published":"2022-03-11T00:02:26Z","modified":"2023-01-27T05:00:37Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:41:43.230329Z"}],"nvd":[{"id":"CVE-2021-44421","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","status":"published","published":"2022-03-10T17:44:15.447Z","modified":"2026-06-17T04:12:19.243Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:07:05.198719Z"}],"osv":[{"id":"CVE-2021-44421","description":"The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.","status":"published","published":"2022-03-10T17:44:15.447Z","modified":"2026-10-20T10:55:06.110621838Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.877444Z"}]}}