CVE-2023-42467: QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256

Recommended actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified

What, why and how

QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256. This stops QEMU and the guest immediately.

What

Why

The product divides a value by zero.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The product divides a value by zero.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path: local access → Divide By Zero → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-369 ↗
CWE-369: Divide By Zero. The product divides a value by zero.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.

CWE-369Public exploit reference

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2023-46907Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2023-2302QEMU: Schwachstelle ermöglicht Denial of Service

Ein lokaler Angreifer kann eine Schwachstelle in QEMU ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory

CERT-FR · French · CERTFR-2025-AVI-0018Multiples vulnérabilités dans les produits Juniper Networks

ecord?id=CVE-2020-11022 Référence CVE CVE-2022-24805 https://www.cve.org/CVERecord?id=CVE-2022-24805 Référence CVE CVE-2022-24806 https://www.cve.org/CVERecord?id=CVE-2022-24806 Référence CVE CVE-2022-24807 https://www.cve.org/CVERecord?id=CVE-2022-24807 Référence CVE CVE-2022-24808 https://www.cve.org/CVERecord?id=CVE-2022-24808 Référence CVE CVE-2022-24809 https://www.cve.org/CVERecord?id=CVE-2022-24809 Référence CVE CVE-2022-24810 https://www.cve.org/CVERecord?id=CVE-2022-24810 Référence CVE CVE-2023-3019 https://www.cve.org/CVERecord?id=CVE-2023-3019 Référence CVE CVE-2023-3255 https://www.cve.org/CVERecord?id=CVE-2023-3255 Référence CVE CVE-2023-42467 https://www.cve.org/CVERecord?id=CVE-2023-42467 Référence CVE CVE-2023-4408 https://www.cve.org/CVERecord?id=CVE-2023-4408 Référence CVE CVE-2023-50387 https://www.cve.org/CVERecord?id=CVE-2023-50387 Référence CVE CVE-2023-50868 https://www.cve.org/CVERecord?id=CVE-2023-50868 Référence CVE CVE-2023-5088 https://www.cve.org/CVERecord?id=CVE-2023-5088 Référence CVE CVE-2023-52463 https://www.cve.org/CVERecord?id=CVE-2023-52463 Référence CVE CVE-2023-52801 https://www.cve.org/CVERecord?id=CVE-2023-52801 Référence CVE CVE-2023-5517 https://www.cve.org/CVERecord?id=CVE-2023-5517 Référence CVE CVE-2023-5679 https://www.cve.org/CVERecord?id=CVE-202

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0619Multiples vulnérabilités dans les produits VMware

org/CVERecord?id=CVE-2023-22084 Référence CVE CVE-2023-23931 https://www.cve.org/CVERecord?id=CVE-2023-23931 Référence CVE CVE-2023-2861 https://www.cve.org/CVERecord?id=CVE-2023-2861 Référence CVE CVE-2023-3180 https://www.cve.org/CVERecord?id=CVE-2023-3180 Référence CVE CVE-2023-3255 https://www.cve.org/CVERecord?id=CVE-2023-3255 Référence CVE CVE-2023-3301 https://www.cve.org/CVERecord?id=CVE-2023-3301 Référence CVE CVE-2023-3354 https://www.cve.org/CVERecord?id=CVE-2023-3354 Référence CVE CVE-2023-40360 https://www.cve.org/CVERecord?id=CVE-2023-40360 Référence CVE CVE-2023-4135 https://www.cve.org/CVERecord?id=CVE-2023-4135 Référence CVE CVE-2023-42467 https://www.cve.org/CVERecord?id=CVE-2023-42467 Référence CVE CVE-2023-49083 https://www.cve.org/CVERecord?id=CVE-2023-49083 Référence CVE CVE-2023-5088 https://www.cve.org/CVERecord?id=CVE-2023-5088 Référence CVE CVE-2023-5868 https://www.cve.org/CVERecord?id=CVE-2023-5868 Référence CVE CVE-2023-5869 https://www.cve.org/CVERecord?id=CVE-2023-5869 Référence CVE CVE-2023-5870 https://www.cve.org/CVERecord?id=CVE-2023-5870 Gestion détaillée du document le 24 juillet 2024 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr fra

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Fix not verified
Affected: n/a
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Evidence and provenance

Published 11 Sept 2023 · Last source change 26 Sept 2024, 17:36 UTC · CWE-369 · Divide By Zero

CVE recordCVE.org · 5.1

CVSS sourceNIST NVD

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2023-46907

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceNIST NVD

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2023-09-11CVE published

ENISA EUVD · EUVD-2023-46907↗CISA Vulnrichment SSVC evidence↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2023-46907

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication

QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2023-46907

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.