Is CVE-2021-3930 in the CISA KEV catalog?

No. CVE-2021-3930 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3930?

CVE-2021-3930 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-3930?

CVE-2021-3930 has an EPSS score of 0.34% (26th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3930?

Upgrade qemu on debian 11 to 1:5.2+dfsg-11+deb11u3 or later. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3930

MEDIUM

6.5

CVSS v3

NVD

Description

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

CWE-193

How to fix

Remediation Available

qemuDebian

Fixed in:1:5.2+dfsg-11+deb11u3CVE-2021-3930

Fixed in:1:6.2+dfsg-1CVE-2021-3930

qemuUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-systemUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-aarch64Ubuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

qemu-system-armUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-mipsUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-miscUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-ppcUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-s390xUbuntu

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-sparcUbuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-x86Ubuntu

Fixed in:2.0.0+dfsg-2ubuntu1.47+esm2USN-5772-1

Fixed in:1:2.5+dfsg-5ubuntu10.51+esm1USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.41USN-5772-1

Fixed in:1:2.11+dfsg-1ubuntu7.39USN-5307-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

qemu-system-x86-microvmUbuntu

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

qemu-system-x86-xenUbuntu

Fixed in:1:4.2-3ubuntu6.21USN-5307-1

Fixed in:1:4.2-3ubuntu6.24USN-5772-1

Fixed in:1:6.2+dfsg-2ubuntu6.6USN-5772-1

Fixed in:1:7.0+dfsg-7ubuntu2.1USN-5772-1

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

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.34%probability of exploitation in 30 days

26thpercentile

Low risk: more likely to be exploited than 26% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory4

Related Vulnerabilities

Other CWE-193 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-3156	High	7.8	99%	KEV	Fix
CVE-2003-0466	Critical	9.8	78%	-	-
CVE-2023-44444	High	7.8	56%	-	Fix
CVE-2021-23017	High	7.7	53%	-	Fix
CVE-2023-28709	High	7.5	52%	-	Fix
CVE-2018-8828	Critical	9.8	31%	-	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.