{"id":"AZL-6897","summary":"CVE-2021-41991 affecting package strongswan for versions less than 5.9.5-1","details":"The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.","modified":"2026-04-21T04:38:32.163922Z","published":"2021-10-18T14:15:10Z","upstream":["CVE-2021-41991"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41991"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/strongswan"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.5-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-6897.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}