medium6.5
CVE-2026-9539
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 ho…
Impact
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).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Freedesktop | Freedesktop.Org Libslirp | before 4.9.2 |
Versions were read from the advisory text. No structured product data has been published for this record yet.