Medium severity6.5NVD Advisory· Published Jun 24, 2026· Updated Jun 25, 2026
CVE-2026-9539
CVE-2026-9539
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).
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Affected products
3- osv-coords2 versionspkg:rpm/opensuse/libslirp&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/libslirp&distro=openSUSE%20Leap%2016.0
< 4.9.3+4-1.1+ 1 more
- (no CPE)range: < 4.9.3+4-1.1
- (no CPE)range: < 4.8.0+2-160000.3.1
Patches
Vulnerability mechanics
References
2News mentions
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