Out-of-Bounds Read in FFmpeg Convolution Filter
CVE-2026-90815

5.3MEDIUM

Key Information:

Vendor

FFmpeg

Status
Ffmpeg
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90815?

A vulnerability exists in the FFmpeg Convolution Filter (specifically in the function setup_3x3 of libavfilter/vf_convolution.c), which allows attackers to execute a remote out-of-bounds read by manipulating function parameters. This flaw makes it possible to access unintended memory regions, potentially leading to information disclosure or further exploits. Users are advised to upgrade to the patched versions: 4.4.7, 5.1.9, 6.1.5, 7.1.4, 8.0.2, 8.1.1, and 9.0 to mitigate this security issue.

Affected Version(s)

FFmpeg 4.4.0

FFmpeg 4.4.1

FFmpeg 4.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-90815 - Proof of Concept

References

https://vuldb.com/vuln/403317
vdb-entrytechnical-description
https://vuldb.com/vuln/403317/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90815
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kery Qi (VulDB User)
.