Nothings stb up to f056911 stb_dupreplace integer overflow
Summary
A vulnerability described as critical has been identified in Nothings stb up to f056911. This impacts the function stb_dupreplace. Such manipulation leads to integer overflow.
This vulnerability is documented as CVE-2025-3408. The attack can be executed remotely. There is not any exploit available.
This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable.
The vendor was contacted early about this disclosure but did not respond in any way.
Details
A vulnerability was found in Nothings stb up to f056911. It has been rated as critical. Affected by this issue is the function stb_dupreplace. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The 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 can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability.
This vulnerability is handled as CVE-2025-3408. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/16/2025).
The vendor was contacted early about this disclosure but did not respond in any way.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
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Product
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍
CVSSv3
VulDB Meta Base Score: 7.1VulDB Meta Temp Score: 7.1
VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 8.8
NVD Vector: 🔍
CNA Base Score: 6.3
CNA Vector: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Integer overflowCWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Timeline
04/07/2025 🔍04/07/2025 🔍
10/16/2025 🔍
Sources
Status: Not definedCVE: CVE-2025-3408 (🔍)
GCVE (CVE): GCVE-0-2025-3408
GCVE (VulDB): GCVE-100-303686
Entry
Created: 04/07/2025 13:01Updated: 10/16/2025 17:22
Changes: 04/07/2025 13:01 (52), 04/08/2025 15:23 (31), 10/16/2025 17:22 (11)
Complete: 🔍
Submitter: ninpwn
Cache ID: 216::103
Submit
Accepted
- Submit #544230: Open Source STB Project (https://github.com/nothings/stb) Latest (<= commit f056911) stb_dupreplace Integer Overflow -> Under Allocation (by ninpwn)
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