CVE-2026-3842 Affecting qemu package, versions <1:10.0.8+ds-0+deb13u1+e2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321882
  • published27 Jul 2026
  • disclosed16 Jul 2026

Introduced: 16 Jul 2026

NewCVE-2026-3842  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 1:10.0.8+ds-0+deb13u1+e2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1