CVE-2026-40614

HIGH EPSS 13.0%
Published Apr 21, 20262mo ago · Modified Jun 17, 20262w ago
8.5 CVSS 4.0
High
Find Similar
Published Apr 21, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
8.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
13.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-122

Affected Products 1

VendorProductVersionRange
pjsippjsip* <2.17

References 2

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

Remediation

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