{"id":"CVE-2021-36305","aliases":["EUVD-2021-22925","GHSA-wr2x-hp98-m8g3"],"status":"published","title":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context...","description":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context in SMB CA handling. An authenticated user of SMB on a cluster with CA could potentially exploit this vulnerability, leading to a denial of service over SMB.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00832,"percentile":0.58043,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-662","CWE-863"],"published":"2021-11-12T22:15:17Z","modified":"2026-06-17T03:58:37Z","products":[{"vendor":"dell","product":"emc_powerscale_onefs"},{"vendor":"dell","product":"powerscale onefs"}],"references":[{"url":"https://www.dell.com/support/kbdoc/000192046","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36305"},{"url":"https://github.com/advisories/GHSA-wr2x-hp98-m8g3"}],"sources":{"cve":[{"id":"CVE-2021-36305","description":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context in SMB CA handling. An authenticated user of SMB on a cluster with CA could potentially exploit this vulnerability, leading to a denial of service over SMB.","status":"published","published":"2021-11-12T22:15:17.318Z","modified":"2024-09-16T18:33:24.071Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-22925","description":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context in SMB CA handling. An authenticated user of SMB on a cluster with CA could potentially exploit this vulnerability, leading to a denial of service over SMB.","status":"published","published":"2021-11-12T22:15:17Z","modified":"2024-09-16T18:33:24Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:55:31.571078Z"}],"ghsa":[{"id":"GHSA-wr2x-hp98-m8g3","title":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context...","description":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context in SMB CA handling. An authenticated user of SMB on a cluster with CA could potentially exploit this vulnerability, leading to a denial of service over SMB.","status":"published","published":"2022-05-24T19:20:37Z","modified":"2023-01-27T05:04:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:42:22.043841Z"}],"nvd":[{"id":"CVE-2021-36305","description":"Dell PowerScale OneFS contains an Unsynchronized Access to Shared Data in a Multithreaded Context in SMB CA handling. An authenticated user of SMB on a cluster with CA could potentially exploit this vulnerability, leading to a denial of service over SMB.","status":"published","published":"2021-11-12T23:15:08.317Z","modified":"2026-06-17T03:58:37.61Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-662"],"updated_at":"2026-11-02T14:07:00.984108Z"}]}}