rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship…
Priority LOW 30CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Partial Red Hat: 4 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two addresses, which allows attackers to trigger an invalid memory copy operation.
Why it matters now
EPSS 0.02458 84th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 4 fixed, 4 without a fix
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:qemu:qemu:4.0.0:*:*:*:*:*:*:* | 4.0.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:4.1.0:*:*:*:*:*:*:* | 4.1.0 | Vulnerable | QEMU |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:qemu:qemu:4.0.0:*:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:4.1.0:*:*:*:*:*:*:* Versions 4.1.0 Vulnerable ·QEMU
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
Red Hat 1 advisory
- RHSA-2021:0347 Released 2021-02-02 · Red Hat rating Moderateqemu-kvm security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) qemu-img-10:1.5.3-175.el7_9.3, qemu-kvm-10:1.5.3-175.el7_9.3, qemu-kvm-common-10:1.5.3-175.el7_9.3 +1
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img-10:1.5.3-175.el7_9.3, qemu-kvm-10:1.5.3-175.el7_9.3, qemu-kvm-common-10:1.5.3-175.el7_9.3 +1
- Red Hat Enterprise Linux Server (v. 7) qemu-img-10:1.5.3-175.el7_9.3, qemu-kvm-10:1.5.3-175.el7_9.3, qemu-kvm-common-10:1.5.3-175.el7_9.3 +1
- Red Hat Enterprise Linux Workstation (v. 7) qemu-img-10:1.5.3-175.el7_9.3, qemu-kvm-10:1.5.3-175.el7_9.3, qemu-kvm-common-10:1.5.3-175.el7_9.3 +1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2021:0347 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2021:0347 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2021:0347 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2021:0347 |
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 8 Advanced Virtualization
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13765
- 2026-10-03 Alias added: GHSA-pf9q-2ff3-67r4
References
Advisory 5
Sources
- CVE-2020-13765 · CVE Program
- CVE-2020-13765 · NVD
- FIRST EPSS
- GHSA-pf9q-2ff3-67r4 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-13765 · Red Hat security data · CC BY 4.0
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