[UPDATE] [medium] QEMU: Vulnerability allows manipulation, disclosure, and DoS

mediumCVE-2026-3842

A local attacker can exploit a vulnerability in QEMU to disclose, modify information, or cause a Denial of Service.

CSIRTS triage

vendor: QEMU product: QEMU Information disclosure Denial of serviceOther

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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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-16
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1083

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-38420.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-3842	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for QEMU

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] QEMU: Vulnerability allows privilege escalationcert-bund · 2026-07-21
highCVE-2026-12080: A flaw was found in the QEMU Guest Agent (qga). A local unprivileged user can exploit a vulner…nvd · 2026-07-20
mediumCVE-2026-51083: Incorrect access control in Proxmox Virtual Environment (PVE) 9.x qemu-server before 9.1.8 and…nvd · 2026-07-17
highCVE-2026-51082: A race condition between the vncproxy and vncwebsocket API calls in Proxmox Virtual Environmen…nvd · 2026-07-17
medium[UPDATE] [medium] QEMU: Vulnerability allows denial of servicecert-bund · 2026-07-16
high[UPDATE] [high] QEMU: Vulnerability allows privilege escalationcert-bund · 2026-07-16