ncnn: Out-of-bounds heap write in ParamDict::load_param via unchecked negative parameter id

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-50144
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-15 20:17:13 UTC
Updated2026-07-17 13:18:54 UTC
Descriptionncnn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS: 0.001080000 probability, percentile 0.014220000 (date 2026-07-20)

Problem Types: CWE-20 | CWE-129 | CWE-787 | CWE-20 CWE-20: Improper Input Validation | CWE-129 CWE-129: Improper Validation of Array Index | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tencent Ncnn affected < 5a0288f255daa6c3294f77109f67718e434ec020 Not specified
CNA Tencent Ncnn affected <= 20260526 Not specified

References

ReferenceSourceLinkTags
github.com/Tencent/ncnn/commit/5a0288f255daa6c3294f77109f67718e434ec020 [email protected] github.com
github.com/Tencent/ncnn/security/advisories/GHSA-jxmc-3mv6-7pwr 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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