Out-of-bounds Read Affecting libslirp package, versions [,4.9.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-LIBSLIRP-17661003
- published28 Jun 2026
- disclosed24 Jun 2026
- creditUnknown
Introduced: 24 Jun 2026
CVE-2026-9539 (opens in a new tab)How to fix?
Upgrade libslirp to version 4.9.2 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the sosendoob process. An attacker can access sensitive host-process heap memory by sending specially crafted TCP segments with manipulated URG flags and urgent pointers from a privileged guest VM.