CVE-2026-9539
6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| freedesktop.org | libslirp | 0 < 4.9.2 | affected |
Weaknesses
- CWE-125: CWE-125 Out-of-bounds read
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
Additional References
References
- https://gitlab.freedesktop.org/slirp/libslirp/-/work_items/93
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/927bca7344e31fd58e2f7afaca784aad4400eb84
- https://gitlab.freedesktop.org/slirp/libslirp/-/releases/v4.9.2
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