CVE-2026-40385: In libexif through 0.6.25, an unsigned 32bit integer overflow in Nikon MakerNote handling could be used by local attackers to cause crashes or information leaks. This only affects 32bit systems.
CVE-2026-40385 is a vulnerability in In libexif through 0.6.25, an unsigned 32bit integer overflow in Nikon MakerNote handling could be used by local attackers to cause crashes or information leaks. This only affects 32bit systems., rated Moderate by Microsoft, with a CVSS 3.1 base score of 4 (Medium). An attacker can exploit it by an attacker with local access, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.09% probability of exploitation activity in the next 30 days, higher than 1% of all scored vulnerabilities. Microsoft released the fix on 13 April 2026 in the April 2026 Patch Tuesday. It affects 4 products in 1 product family (Open Source Software).
Key facts
- CVE ID
- CVE-2026-40385
- Severity
- Medium CVSS 4
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-190
- EPSS
- 0.09% (percentile 1%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- April 2026 Patch Tuesday
- Product families
- Open Source Software
CVSS score and vector
Microsoft scores CVE-2026-40385 at 4 (temporal 4) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
| Metric | Value |
|---|---|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | Low |
| Integrity impact | None |
| Availability impact | Low |
Affected products (4)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 libexif 0.6.24-2 on Azure Linux 3.0 | CBL-Mariner Releases | Security Update | 0.6.24-3 | No |
| cbl2 libexif 0.6.24-2 on CBL Mariner 2.0 | CBL-Mariner Releases | Security Update | 0.6.24-3 | No |
| azl3 libexif 0.6.24-3 on Azure Linux 3.0 | CBL-Mariner Releases | Security Update | 0.6.24-3 | No |
| cbl2 libexif 0.6.24-2 on CBL-Mariner 2.0 | Release Notes | Security Update | 0.6.24-3 |
NIST NVD data
- NVD status
- Analyzed
- NVD CVSS
- 4 (MEDIUM)
- NVD weakness
- CWE-190
- Published to NVD
- NVD last modified
Affected configurations (CPE)
| Product | Vulnerable versions |
|---|---|
| libexif | up to and including 0.6.25 |
References
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 2.0 | Information published. | |
| 3.0 | Information published. | |
| 4.0 | Information published. | |
| 5.0 | Information published. | |
| 6.0 | Information published. |