CVE-2023-3180

Guest-triggered process crash via mismatched crypto lengths

Published Aug 3, 2023 · Updated Sep 25, 2024

Heap buffer overflow in QEMU's virtio-crypto device allows guest OS users to crash the QEMU process via a malformed request. The helper trusts unequal src_len and dst_len values when sizing symmetric encryption or decryption buffers instead of rejecting the request. Exploitation requires high privileges in a guest with the virtio-crypto device exposed and can terminate the associated virtual machine process without disclosing or modifying data.

CVSS severity6.0
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in QEMU's virtio-crypto device allows guest OS users to crash the QEMU process via a malformed request. The helper trusts unequal src_len and dst_len values when sizing symmetric encryption or decryption buffers instead of rejecting the request. Exploitation requires high privileges in a guest with the virtio-crypto device exposed and can terminate the associated virtual machine process without disclosing or modifying data.

The record

CVE
CVE-2023-3180
Published
Aug 3, 2023
Updated
Sep 25, 2024
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-122, CWE-787, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Fedora Project · Fedora LinuxAffected versions are unavailable in this record.
QEMU Project · QEMUAffected versions are unavailable in this record.

Published CVSS scores

6.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.0Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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