{"id":"AZL-99123","summary":"CVE-2026-56855 affecting package buildah 1.43.1-2","details":"Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.","modified":"2026-09-05T14:16:58.212940139Z","published":"2026-09-02T20:17:36Z","upstream":["CVE-2026-56855"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56855"}],"affected":[{"package":{"name":"buildah","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/buildah"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.43.1-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99123.json"}}],"schema_version":"1.9.0"}