CVE-2023-42467: qemu Divide By Zero
Vulnerability summary
CVE-2023-42467 is a medium (CVSS 5.5) Divide By Zero vulnerability in qemu. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.8% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 11-09-2023PublishedVulnerability first disclosed.
- 26-09-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 version- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.41% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (gitlab.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- qemu< 1:7.2+dfsg-7+deb12u3 | < 1:8.1.1+ds-1
Opensuse1 product
- qemu&distro=openSUSE Tumbleweed< 8.1.2-1.1
Qemu1 product
- qemu≤ 8.0.0
Suse1 product
- qemu&distro=SUSE Linux Enterprise Micro 5.5< 7.1.0-150500.49.30.1
4 vendors · 4 products
