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PJSIP: Heap buffer overflow in the AVI parser

CVSS 4.0 6.9 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-77396

Published

PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the PJSIP AVI parser in pjmedia/src/pjmedia/avi_player.c uses an input-file video chunk length as the number of bytes copied into a frame buffer whose capacity is derived from the declared media dimensions. A crafted AVI file can therefore cause an attacker-controlled out-of-bounds write past the heap allocation when an application plays the file or pulls its frames. The existing size assertion does not protect production release builds, where assertions are disabled. Typical local playback can crash the process, while applications that accept untrusted AVI sources expose a stronger memory-corruption condition. No fixed version is available as of this review.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-77396

Published

pjproject

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "pjsip",
                    "product": "pjproject",
                    "versions": [
                        {
                            "version": "<= 2.17",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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Sources read 12 Nov 23:52 UTC · 273 of 275 readable · 271 fully read · documentation 469/469 current