CVE-2024-45063Network attack vector

Code execution via ctl_write_buffer use-after-free

Published Sep 5, 2024 · Updated Nov 4, 2025

Use-after-free in FreeBSD ctl before 13.3-RELEASE-p6, 14.0-RELEASE-p10, and 14.1-RELEASE-p4 allows attackers to execute code. ctl_write_buffer marks a persistent LUN buffer as request-allocated, so command completion frees memory still referenced by lun->write_buffer. Exposure requires either a bhyve guest with virtio_scsi or an iSCSI target; code runs in sandboxed bhyve userspace or on the target host.

CVSS severity9.8
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in FreeBSD ctl before 13.3-RELEASE-p6, 14.0-RELEASE-p10, and 14.1-RELEASE-p4 allows attackers to execute code. ctl_write_buffer marks a persistent LUN buffer as request-allocated, so command completion frees memory still referenced by lun->write_buffer. Exposure requires either a bhyve guest with virtio_scsi or an iSCSI target; code runs in sandboxed bhyve userspace or on the target host.

The record

CVE
CVE-2024-45063
Published
Sep 5, 2024
Updated
Nov 4, 2025
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-416, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13.3 <13.3_p6
  2. Affected versionversion=13.3-RELEASE <p6
  3. Affected versionversion=14.0 <14.0_p10
  4. Affected versionversion=14.0-RELEASE <p10
  5. Affected versionversion=14.1 <14.1_p4
  6. Affected versionversion=14.1-RELEASE <p4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The FreeBSD Project · FreeBSDversion=13.3 <13.3_p6; version=13.3-RELEASE <p6; version=14.0 <14.0_p10; version=14.0-RELEASE <p10; version=14.1 <14.1_p4; version=14.1-RELEASE <p4

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1210Exploitation of Remote Services

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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