CVE & CISA-KEV Catalog

CVE-2018-20124

MEDIUM

5.5

CVSS v3

Description

hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

qemuDebian

Fixed in:1:4.1-1CVE-2018-20124

Fixed in:1:4.1-1CVE-2018-20124

Fixed in:1:4.1-1CVE-2018-20124

Fixed in:1:4.1-1CVE-2018-20124

qemuUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-systemUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-aarch64Ubuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

qemu-system-armUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-mipsUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-miscUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-ppcUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-s390xUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-sparcUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

qemu-system-x86Ubuntu

Fixed in:2.0.0+dfsg-2ubuntu1.45USN-3923-1

Fixed in:1:2.5+dfsg-5ubuntu10.36USN-3923-1

Fixed in:1:2.11+dfsg-1ubuntu7.12USN-3923-1

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.49%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Patch2

Third-Party Advisory2

Related Vulnerabilities

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

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	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 2024-11-21.