{"id":"UBUNTU-CVE-2021-3998","details":"A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.","modified":"2026-01-30T02:15:15.526539Z","published":"2022-02-01T00:00:00Z","withdrawn":"2025-07-18T16:46:31Z","related":["USN-5310-1"],"upstream":["CVE-2021-3998"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3998"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5310-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3998"}],"affected":[{"package":{"name":"glibc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/glibc@2.35-0ubuntu1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.35-0ubuntu1"}]}],"versions":["2.34-0ubuntu3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"glibc-doc","binary_version":"2.35-0ubuntu1"},{"binary_name":"glibc-source","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc-bin","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc-bin-dbgsym","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc-dev-bin","binary_version":"2.35-0ubuntu1"},{"binary_version":"2.35-0ubuntu1","binary_name":"libc-dev-bin-dbgsym"},{"binary_name":"libc-devtools","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc-devtools-dbgsym","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-amd64","binary_version":"2.35-0ubuntu1"},{"binary_version":"2.35-0ubuntu1","binary_name":"libc6-amd64-dbgsym"},{"binary_version":"2.35-0ubuntu1","binary_name":"libc6-dbg"},{"binary_version":"2.35-0ubuntu1","binary_name":"libc6-dev"},{"binary_name":"libc6-dev-amd64","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-dev-i386","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-dev-s390","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-dev-x32","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-i386","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-i386-dbgsym","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-prof","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-s390","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-s390-dbgsym","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-x32","binary_version":"2.35-0ubuntu1"},{"binary_name":"libc6-x32-dbgsym","binary_version":"2.35-0ubuntu1"},{"binary_name":"locales","binary_version":"2.35-0ubuntu1"},{"binary_name":"locales-all","binary_version":"2.35-0ubuntu1"},{"binary_name":"nscd","binary_version":"2.35-0ubuntu1"},{"binary_version":"2.35-0ubuntu1","binary_name":"nscd-dbgsym"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3998.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}