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NVD / CVE Program· CNA mitre

CVE-2020-13765: 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 tri

Noroxi assessment

Priority: Monitor (action score 23/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.4% (FIRST EPSS); higher than 84.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: qemu (Debian:10) 1:3.1+dfsg-8+deb10u6; qemu (Debian:12) 1:4.2-1; qemu (Debian:8) 1:2.1+dfsg-12+deb8u15.

Low priority for now. Upgrade to qemu (Debian:10) 1:3.1+dfsg-8+deb10u6; qemu (Debian:12) 1:4.2-1; qemu (Debian:8) 1:2.1+dfsg-12+deb8u15 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.6 · v3.1—No exploit Fix available
Published
Jun 4, 2020
Updated
Jun 16, 2026
EPSS
2.4% · 84th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
22 / 40 · 5.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
qemuqemu
canonicalubuntu linux
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux20.04
  • debian debian linux8.0
  • debian debian linux9.0
  • qemu qemu4.0.0
  • qemu qemu4.1.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10qemubefore 1:3.1+dfsg-8+deb10u61:3.1+dfsg-8+deb10u6
Debian:12qemubefore 1:4.2-11:4.2-1
Debian:8qemubefore 1:2.1+dfsg-12+deb8u151:2.1+dfsg-12+deb8u15
Debian:9qemubefore 1:2.8+dfsg-6+deb9u101:2.8+dfsg-6+deb9u10
Red Hat:enterprise_linux:7::clientqemu-imgbefore 10:1.5.3-175.el7_9.310:1.5.3-175.el7_9.3
Red Hat:enterprise_linux:7::clientqemu-kvmbefore 10:1.5.3-175.el7_9.310:1.5.3-175.el7_9.3
Red Hat:enterprise_linux:7::clientqemu-kvm-commonbefore 10:1.5.3-175.el7_9.310:1.5.3-175.el7_9.3
Red Hat:enterprise_linux:7::clientqemu-kvm-debuginfobefore 10:1.5.3-175.el7_9.310:1.5.3-175.el7_9.3
Red Hat:enterprise_linux:7::clientqemu-kvm-toolsbefore 10:1.5.3-175.el7_9.310:1.5.3-175.el7_9.3
SUSE:HPE Helion OpenStack 8qemubefore 2.9.1-6.47.12.9.1-6.47.1
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOSqemubefore 3.1.1.1-9.24.33.1.1.1-9.24.3
SUSE:Linux Enterprise High Performance Computing 15-ESPOSqemubefore 2.11.2-9.43.12.11.2-9.43.1
SUSE:Linux Enterprise Point of Sale 11 SP3kvmbefore 1.4.2-53.38.11.4.2-53.38.1
SUSE:Linux Enterprise Server 11 SP4-LTSSkvmbefore 1.4.2-60.34.11.4.2-60.34.1
SUSE:Linux Enterprise Server 12 SP2-BCLqemubefore 2.6.2-41.62.12.6.2-41.62.1
SUSE:Linux Enterprise Server 12 SP5qemubefore 3.1.1.1-48.23.1.1.1-48.2
SUSE:OpenStack Cloud 9qemubefore 2.11.2-5.29.12.11.2-5.29.1

Same product

qemu: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-12928The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command injection, which allows the remote attacker to achieve
    60This week
  • CVE-2015-8556Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
    44Plan
  • CVE-2017-15118A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an expor
    43Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-13659Jun 2, 2020 · address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.
    10Monitor
  • ← EarlierCVE-2020-13754Jun 2, 2020 · hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation.
    26Monitor
  • Later →CVE-2020-13791Jun 4, 2020 · hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an address near the end of the PCI configur
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:qemu1:4.2-1 · Debian:12Package registry (OSV)
red hat:qemu-img10:1.5.3-175.el7_9.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:qemu-kvm10:1.5.3-175.el7_9.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:qemu-kvm-common10:1.5.3-175.el7_9.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:qemu-kvm-debuginfo10:1.5.3-175.el7_9.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:qemu-kvm-tools10:1.5.3-175.el7_9.3 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
suse:kvm1.4.2-60.34.1 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:qemu2.9.1-6.47.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records