{"id":"AZL-36999","summary":"CVE-2021-20254 affecting package samba for versions less than 4.18.3-1","details":"A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.","modified":"2026-04-01T05:13:07.717401Z","published":"2021-05-05T14:15:07Z","upstream":["CVE-2021-20254"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20254"}],"affected":[{"package":{"name":"samba","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/samba"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.3-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-36999.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}