CVE-2026-112074: Tencent ncnn Conversion API mat_pixel.cpp yuv420sp2rgb integer overflow

Vulnerability summary

CVE-2026-112074 is a high (CVSS 7.5) Numeric Errors vulnerability in tencent ncnn. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 19-10-2026
   PublishedVulnerability first disclosed.
2. 19-10-2026
   Last modifiedVulnerability information updated.

Description

A security flaw has been discovered in Tencent ncnn up to 44b02dabdcf97499281a4692ebd65bad73dcf8b6. Affected by this issue is the function ncnn::yuv420sp2rgb of the file src/mat_pixel.cpp of the component Conversion API. The manipulation results in integer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

• CWE-189Numeric ErrorsWeaknesses in this category are related to improper calculation or conversion of numbers.
• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.