{"id":"UBUNTU-CVE-2026-47784","details":"In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.","modified":"2026-05-27T14:00:05.968389114Z","published":"2026-05-20T07:16:00Z","related":["USN-8320-1"],"upstream":["CVE-2026-47784"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-47784"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-47784"},{"type":"REPORT","url":"https://github.com/memcached/memcached/compare/1.6.41...1.6.42"},{"type":"REPORT","url":"https://github.com/memcached/memcached/wiki/ReleaseNotes1642"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8320-1"}],"affected":[{"package":{"name":"memcached","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.24-2ubuntu1","1.4.25-1ubuntu2","1.4.25-2ubuntu1","1.4.25-2ubuntu1.2","1.4.25-2ubuntu1.3","1.4.25-2ubuntu1.4","1.4.25-2ubuntu1.5","1.4.25-2ubuntu1.5+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.25-2ubuntu1.5+esm1","binary_name":"memcached"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.33-1ubuntu3","1.5.4-1ubuntu2","1.5.4-1ubuntu3","1.5.6-0ubuntu1","1.5.6-0ubuntu1.1","1.5.6-0ubuntu1.2","1.5.6-0ubuntu1.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.5.6-0ubuntu1.2+esm1","binary_name":"memcached"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.10-0ubuntu3","1.5.10-0ubuntu4","1.5.19-2","1.5.20-1","1.5.22-1ubuntu1","1.5.22-2","1.5.22-2ubuntu0.1","1.5.22-2ubuntu0.2","1.5.22-2ubuntu0.3"],"ecosystem_specific":{"binaries":[{"binary_name":"memcached","binary_version":"1.5.22-2ubuntu0.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.14-1ubuntu0.2"}]}],"versions":["1.6.9+dfsg-1build1","1.6.12+dfsg-2ubuntu1","1.6.12+dfsg-3","1.6.12+dfsg-4","1.6.13-1","1.6.14-1","1.6.14-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.14-1ubuntu0.2","binary_name":"memcached"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.24-1ubuntu0.1"}]}],"versions":["1.6.21-1","1.6.22-1","1.6.23-1","1.6.24-1build1","1.6.24-1build3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"memcached","binary_version":"1.6.24-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.38-1ubuntu0.1"}]}],"versions":["1.6.37-1","1.6.38-1","1.6.38-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.38-1ubuntu0.1","binary_name":"memcached"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}},{"package":{"name":"memcached","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/memcached?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.40-1ubuntu0.1"}]}],"versions":["1.6.38-1build1","1.6.39-2","1.6.40-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.6.40-1ubuntu0.1","binary_name":"memcached"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47784.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}