{"id":"AZL-90222","summary":"CVE-2026-56117 affecting package dhcpcd for versions less than 10.0.8-2","details":"dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separation is disabled. Attackers can connect to the control socket and send a privileged command such as -x, causing control_recvdata() to free the client object while the same READ+HANGUP event subsequently reaches control_hangup() with the stale pointer, resulting in a use-after-free condition exploitable in deployments using --disable-privsep or where privsep initialization has failed with the control socket operating in mode 0666.","modified":"2026-09-04T05:27:10Z","published":"2026-06-23T17:17:09Z","upstream":["CVE-2026-56117"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56117"}],"affected":[{"package":{"name":"dhcpcd","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/dhcpcd"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.0.8-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-90222.json"}}],"schema_version":"1.9.0"}