NULL pointer dereference in QEMU
Priority LOW 20CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Why it matters now
EPSS 0.00317 24th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | QEMU | qemu 6.0.0 | — | No fix listed | CNA |
- QEMU Vendor— Affected qemu 6.0.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* | before 6.0.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:6.0.0:rc1:*:*:*:*:*:* | 6.0.0 rc1 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:6.0.0:rc2:*:*:*:*:*:* | 6.0.0 rc2 | Vulnerable | QEMU |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions before 6.0.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:6.0.0:rc1:*:*:*:*:*:* Versions 6.0.0 rc1 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:6.0.0:rc2:*:*:*:*:*:* Versions 6.0.0 rc2 Vulnerable ·QEMU
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 8 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8 Advanced Virtualization
- Red Hat Enterprise Linux 9
- Red Hat OpenStack Platform 10 (Newton)
- Red Hat OpenStack Platform 13 (Queens)
Timeline
- 2026-10-02 Threatist record created from CVE-2020-35505
- 2026-10-03 Alias added: GHSA-h3ch-qvjw-gr8j
References
Patch 2
Sources
- CVE-2020-35505 · CVE Program
- CVE-2020-35505 · NVD
- FIRST EPSS
- GHSA-h3ch-qvjw-gr8j · GitHub Advisory Database · CC BY 4.0
- CVE-2020-35505 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences