gphoto libgphoto2 up to 2.5.33 camlibs/ptp2/ptp-pack.c ptp_unpack_Sony_DPD memory leak

Summaryinfo

A vulnerability was found in gphoto libgphoto2 up to 2.5.33. It has been rated as problematic. This impacts the function ptp_unpack_Sony_DPD of the file camlibs/ptp2/ptp-pack.c. The manipulation leads to memory leak. This vulnerability is traded as CVE-2026-40336. It is possible to launch the attack on the physical device. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in gphoto libgphoto2 up to 2.5.33 and classified as problematic. This issue affects the function ptp_unpack_Sony_DPD of the file camlibs/ptp2/ptp-pack.c. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have a memory leak in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (lines 884–885). When processing a secondary enumeration list (introduced in 2024+ Sony cameras), the function overwrites dpd->FORM.Enum.SupportedValue with a new calloc() without freeing the previous allocation from line 857. The original array and any string values it contains are leaked on every property descriptor parse. Commit 404ff02c75f3cb280196fc260a63c4d26cf1a8f6 fixes the issue.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-40336 since 04/11/2026. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Applying the patch 404ff02c75f3cb280196fc260a63c4d26cf1a8f6 is able to eliminate this problem. The bugfix is ready for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best 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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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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