CVE & CISA-KEV Catalog

CVE-2015-8743

HIGH
7.1
CVSS v3
NVD

Description

QEMU (aka Quick Emulator) built with the NE2000 device emulation support is vulnerable to an OOB r/w access issue. It could occur while performing 'ioport' r/w operations. A privileged (CAP_SYS_RAWIO) user/process could use this flaw to leak or corrupt QEMU memory bytes.

CWE-125Out-of-bounds ReadCWE-787Out-of-bounds Write

How to fix

Remediation Available
qemuDebian
Fixed in:1:2.5+dfsg-2CVE-2015-8743
Fixed in:1:2.5+dfsg-2CVE-2015-8743
Fixed in:1:2.5+dfsg-2CVE-2015-8743
Fixed in:1:2.5+dfsg-2CVE-2015-8743
qemuUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-systemUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-aarch64Ubuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-armUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-mipsUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-miscUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-ppcUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-sparcUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1
qemu-system-x86Ubuntu
Fixed in:2.0.0+dfsg-2ubuntu1.22USN-2891-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.45%probability of exploitation in 30 days
36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Issue Tracking1

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0160High7.5100%KEVFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2021-4034High7.895%KEVFix
CVE-2023-21769High7.592%-Fix
CVE-2023-49285High8.689%-Fix
CVE-2020-8794Critical9.889%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.