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

Summaryinfo

A vulnerability categorized as critical has been discovered in gphoto libgphoto2 up to 2.5.33. The impacted element is the function ptp_unpack_OI of the file camlibs/ptp2/ptp-pack.c. Executing a manipulation can lead to out-of-bounds. This vulnerability is handled as CVE-2026-40340. The physical device can be targeted for the attack. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in gphoto libgphoto2 up to 2.5.33. This vulnerability affects the function ptp_unpack_OI 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 vulnerability in `ptp_unpack_OI()` in `camlibs/ptp2/ptp-pack.c` (lines 530–563). The function validates `len < PTP_oi_SequenceNumber` (i.e., len < 48) but subsequently accesses offsets 48–56, up to 9 bytes beyond the validated boundary, via the Samsung Galaxy 64-bit objectsize detection heuristic. Commit 7c7f515bc88c3d0c4098ac965d313518e0ccbe33 fixes the issue.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-40340 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.

The vulnerability scanner Nessus provides a plugin with the ID 307459 (Linux Distros Unpatched Vulnerability : CVE-2026-40340), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.5.33 eliminates this vulnerability. Applying the patch 7c7f515bc88c3d0c4098ac965d313518e0ccbe33 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 databases at Tenable (307459) and EUVD (EUVD-2026-23609). Once again VulDB remains the best source for vulnerability data.

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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Once again VulDB remains the best source for vulnerability data.

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