CVE-2026-40385 | libexif up to 0.6.25 Nikon MakerNote integer overflow

VDB-357044 · CVE-2026-40385 · GCVE-0-2026-40385 LIBEXIF UP TO 0.6.25 NIKON MAKERNOTE INTEGER OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.0 $0-$5k 1.28 Summaryinfo A vulnerability, which was classified as critical, was found in libexif up to 0.6.25. The affected element is an unknown function of the component Nikon MakerNote Handler. Such manipulation leads to integer overflow. This vulnerability is traded as CVE-2026-40385. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue. Detailsinfo A vulnerability was found in libexif up to 0.6.25 and classified as critical. Affected by this issue is some unknown functionality of the component Nikon MakerNote Handler. 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. CVE summarizes: 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. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-40385 since 04/12/2026. 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. There are neither technical details nor an exploit publicly available. Applying the patch 93003b93e50b3d259bd2227d8775b73a53c35d58 is able to eliminate this problem. The bugfix is ready for download at github.com. Productinfo Name libexif Version 0.6.0 0.6.1 0.6.2 0.6.3 0.6.4 0.6.5 0.6.6 0.6.7 0.6.8 0.6.9 0.6.10 0.6.11 0.6.12 0.6.13 0.6.14 0.6.15 0.6.16 0.6.17 0.6.18 0.6.19 0.6.20 0.6.21 0.6.22 0.6.23 0.6.24 0.6.25 License open-source Website Product: https://github.com/libexif/libexif/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.2 VulDB Meta Temp Score: 5.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.0 CNA Vector (MITRE): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Integer overflow CWE: CWE-190 / CWE-189 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Patch Status: 🔍 0-Day Time: 🔒 Patch: 93003b93e50b3d259bd2227d8775b73a53c35d58 Timelineinfo 04/12/2026 Advisory disclosed 04/12/2026 +0 days CVE reserved 04/12/2026 +0 days VulDB entry created 04/12/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 93003b93e50b3d259bd2227d8775b73a53c35d58 Status: Confirmed CVE: CVE-2026-40385 (🔒) GCVE (CVE): GCVE-0-2026-40385 GCVE (VulDB): GCVE-100-357044 Entryinfo Created: 04/12/2026 21:27 Changes: 04/12/2026 21:27 (65) Complete: 🔍 Cache ID: 99:A5D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸