CVE-2022-39244Network attack vector

Memory corruption via unchecked parser bounds

Published Oct 6, 2022 · Updated Nov 4, 2025

Buffer overflow in PJSIP PJPROJECT before 2.13 allows remote attackers to trigger out-of-bounds memory access via crafted SIP, SDP, or RTP data. The pjlib scanner and PJMEDIA SDP parser dereference cursor positions without confirming that they remain before the input end, while the RTP decoder accepts a computed header offset equal to the packet length. A target application must parse traffic from an untrusted peer; the published record requires user interaction and reports confidentiality, integrity, and availability impact.

CVSS severity7.5
High
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in PJSIP PJPROJECT before 2.13 allows remote attackers to trigger out-of-bounds memory access via crafted SIP, SDP, or RTP data. The pjlib scanner and PJMEDIA SDP parser dereference cursor positions without confirming that they remain before the input end, while the RTP decoder accepts a computed header offset equal to the packet length. A target application must parse traffic from an untrusted peer; the published record requires user interaction and reports confidentiality, integrity, and availability impact.

The record

CVE
CVE-2022-39244
Published
Oct 6, 2022
Updated
Nov 4, 2025
Vendor
PJSIP
Product
PJPROJECT
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2022CVE 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

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Is a vulnerable build present?

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

  1. Affected versionversion=< 2.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PJSIP · PJPROJECTversion=< 2.13

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

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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