{"id":"AZL-90912","summary":"CVE-2026-9539 affecting package libslirp for versions less than 4.9.3-1","details":"An out-of-bounds heap read and integer underflow in the TCP urgent data handling (sosendoob) in freedesktop.org libslirp version before v4.9.2 on hypervisor host environments (e.g., QEMU) allows a privileged guest VM attacker (root or CAP_NET_RAW) to leak gigabytes of sensitive host-process heap memory via sending crafted TCP segments with manipulated URG flags and urgent pointers (ti_urp).","modified":"2026-08-28T17:48:11.798679700Z","published":"2026-06-24T05:17:31Z","upstream":["CVE-2026-9539"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9539"}],"affected":[{"package":{"name":"libslirp","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/libslirp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.3-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-90912.json"}}],"schema_version":"1.9.0"}