CVE-2026-3842
High · 7.8CVSS
7.8
EPSS
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Published
Jul 16, 2026
CISA due date
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The record
A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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