CVE-2026-3842
A local attacker can exploit a vulnerability in QEMU to disclose, modify information, or cause a Denial of Service.
CSIRTS triage
- What
- A vulnerability in QEMU allows a local attacker to disclose, modify information, or cause a Denial of Service.
- Who is affected
- Local deployments of QEMU are affected by this vulnerability.
- Urgency
- Remediation is necessary to prevent potential information disclosure and service disruption.
- Action
- Apply the latest updates for QEMU to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[UPDATE] [medium] QEMU: Vulnerability allows manipulation, disclosure, and DoScert-bund · 2026-07-16
- highCVE-2026-3842: A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual mac…nvd · 2026-07-16
- highCVE-2026-3842: Qemu-kvm: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host …msrc · 2026-07-14
External references
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[](https://www.csirts.com/cve/CVE-2026-3842)