QEMU: am53c974: denial of service due to division by zero
Published Sep 11, 2023
5.5
MEDIUMCVSS 3.1
EPSS 0.41%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 9
qemu-kvm-17:8.2.0-11.el9_4
Fixed · RHSA-2024:2135
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-ma
Not affected
Red Hat Enterprise Linux 8
virt:rhel/qemu-kvm
Not affected
Red Hat Enterprise Linux 8 Advanced Virtualization
virt:av/qemu-kvm
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | qemu-kvm-17:8.2.0-11.el9_4 | Fixed | RHSA-2024:2135 |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | n/a |
| Red Hat Enterprise Linux 8 | virt:rhel/qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 8 Advanced Virtualization | virt:av/qemu-kvm | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Triggering this bug requires kernel or root privileges in the guest VM because it requires direct hardware access. Anyone who has these privileges could also just perform a regular shutdown of the VM, with only a very slightly different result.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 26, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2023-2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.41% (0.00415) | 33.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00376) | 29.17th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00049) | 12.35th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Sep 11, 2023 | 0.04% (0.00043) | 6.91th | v3 (v2023.03.01) |
References (7)
- https://access.redhat.com/security/cve/CVE-2023-42467 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2238291 Issue Tracking
- https://gitlab.com/qemu-project/qemu/-/commit/7cfcc79b0ab800959716738aff9419f53fc68c9c
- https://gitlab.com/qemu-project/qemu/-/issues/1813 ExploitIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-42467
- https://security.netapp.com/advisory/ntap-20231103-0005/
- https://www.cve.org/CVERecord?id=CVE-2023-42467
Change history (0)
No recorded changes yet.