Buffer overflow in Tencent Ncnn
CVE-2026-50144
ncnn is a high-performance neural network inference framework optimized for the mobile platform. In commit e54f7b1f88434e1d844ea0551b880a1cfb079ce1 and earlier, ncnn allows an out-of-bounds heap write in ncnn::ParamDict::load_param() when Net::load_param() loads a malicious .param model file because the parsed parameter id is checked only against id >= NCNN_MAX_PARAM_COUNT, allowing a negative id to index before the params[NCNN_MAX_PARAM_COUNT] array. This vulnerability is fixed by commit 5a0288f255daa6c3294f77109f67718e434ec020.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.002 (5.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
Affected products
- Tencent Ncnn — versions < 5a0288f255daa6c3294f77109f67718e434ec020, <= 20260526
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-50144?
- CVE-2026-50144 is a high-severity vulnerability in Tencent Ncnn, classified under Improper Input Validation. CVSS score: 7.1/10. Published 2026-07-15.
- How severe is CVE-2026-50144?
- High severity. CVSS v3 base score is 7.1 out of 10.