CVE-2022-45474Public exploitNetwork attack vector

Invalid memory read via freed socket-state pointer

Published Nov 18, 2022 · Updated Apr 29, 2025

Use-after-free in drachtio-server 0.8.18 allows remote attackers to trigger an invalid memory read by sending any SIP call request. The event_cb callback dereferences its fdp socket-state pointer after curl_multi_socket_action can invoke remsock and free that allocation. A network-reachable SIP listener is sufficient; the upstream reproducer reports the invalid read on the default request path for a received call.

CVSS severity9.8
Critical
EPSS probability0.97%
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 drachtio-server 0.8.18 allows remote attackers to trigger an invalid memory read by sending any SIP call request. The event_cb callback dereferences its fdp socket-state pointer after curl_multi_socket_action can invoke remsock and free that allocation. A network-reachable SIP listener is sufficient; the upstream reproducer reports the invalid read on the default request path for a received call.

The record

CVE
CVE-2022-45474
Published
Nov 18, 2022
Updated
Apr 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 2025Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

Public exploit references

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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