gphoto libgphoto2 up to 2.5.33 camlibs/ptp2/ptp-pack.c ptp_unpack_DPV out-of-bounds

Summaryinfo

A vulnerability was found in gphoto libgphoto2 up to 2.5.33. It has been declared as critical. This affects the function ptp_unpack_DPV of the file camlibs/ptp2/ptp-pack.c. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2026-40335. The physical device can be targeted for the attack. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in gphoto libgphoto2 up to 2.5.33 and classified as critical. This vulnerability affects the function ptp_unpack_DPV of the file camlibs/ptp2/ptp-pack.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in `ptp_unpack_DPV()` in `camlibs/ptp2/ptp-pack.c` (lines 622–629). The UINT128 and INT128 cases advance `*offset += 16` without verifying that 16 bytes remain in the buffer. The entry check at line 609 only guarantees `*offset < total` (at least 1 byte available), leaving up to 15 bytes unvalidated. Commit 433bde9888d70aa726e32744cd751d7dbe94379a patches the issue.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-40335 since 04/11/2026. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading to version 2.5.33 eliminates this vulnerability. Applying the patch 433bde9888d70aa726e32744cd751d7dbe94379a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23586). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• gphoto

Name

• libgphoto2

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23
• 2.5.24
• 2.5.25
• 2.5.26
• 2.5.27
• 2.5.28
• 2.5.29
• 2.5.30
• 2.5.31
• 2.5.32
• 2.5.33

License

• open-source

Website

• Product: https://github.com/gphoto/libgphoto2/

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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