CVE-2026-40614

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC decode buffers (dec_frame[].buf) were allocated based on a PCM-derived formula: (sample_rate/1000) * 60 * channel_cnt * 2. At 8 kHz mono this yields only 960 bytes, but codec_parse() can output encoded frames up to MAX_ENCODED_PACKET_SIZE (1280) bytes via opus_repacketizer_out_range(). The three pj_memcpy() calls in codec_decode() copied input->size bytes without bounds checking, causing a heap buffer overflow.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pjsip/pjproject/commit/17897e835818f8ee03b1806ddcd7b95ea16d2c0e	Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-j59p-4xrr-fp8g	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*

History

23 Apr 2026, 16:09

Type	Values Removed	Values Added
References	~~() https://github.com/pjsip/pjproject/commit/17897e835818f8ee03b1806ddcd7b95ea16d2c0e -~~	() https://github.com/pjsip/pjproject/commit/17897e835818f8ee03b1806ddcd7b95ea16d2c0e - Patch
References	~~() https://github.com/pjsip/pjproject/security/advisories/GHSA-j59p-4xrr-fp8g -~~	() https://github.com/pjsip/pjproject/security/advisories/GHSA-j59p-4xrr-fp8g - Patch, Vendor Advisory
CPE		cpe:2.3:a:pjsip:pjsip::::::::
First Time		Pjsip Pjsip pjsip
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8

21 Apr 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-21 19:16

Updated : 2026-04-23 16:09

NVD link : CVE-2026-40614

Mitre link : CVE-2026-40614

CVE.ORG link : CVE-2026-40614

JSON object : View

Products Affected

pjsip

pjsip

CWE

CWE-122

Heap-based Buffer Overflow

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