CVE-2026-9539 – libslirp TCP URG OOB Read Information Leak

CVE ID :CVE-2026-9539

Published : June 24, 2026, 4:37 a.m. | 1 hour, 7 minutes ago

Description :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).

Severity: 6.5 | MEDIUM

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