CVE-2026-40338
libgphoto2 has OOB read in ptp_unpack_Sony_DPD() enumeration count parsing in ptp-pack.c
Description
libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in the PTP_DPFF_Enumeration case of `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 856). The function reads a 2-byte enumeration count N via `dtoh16o(data, *poffset)` without verifying that 2 bytes remain in the buffer. The standard `ptp_unpack_DPD()` at line 704 has this exact check, confirming the Sony variant omitted it by oversight. Commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 fixes the issue.
INFO
Published Date :
April 18, 2026, 12:16 a.m.
Last Modified :
Oct. 26, 2026, 10:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update libgphoto2 to version 2.5.34 or later.
- Apply the fix from commit 3b9f9696be76ae51dca983d9dd8ce586a2561845.
- Ensure proper buffer size checks are implemented.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40338.
| URL | Resource |
|---|---|
| https://github.com/gphoto/libgphoto2/commit/3b9f9696be76ae51dca983d9dd8ce586a2561845 | |
| https://github.com/gphoto/libgphoto2/security/advisories/GHSA-2hwp-w84q-27hf |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40338 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40338
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40338 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40338 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: libgphoto2 de gphoto, Description: libgphoto2 es una biblioteca de acceso y control de cámaras. Las versiones hasta la 2.5.33 inclusive tienen una lectura fuera de límites en el caso PTP_DPFF_Enumeration de ’ptp_unpack_Sony_DPD()’ en ’camlibs/ptp2/ptp-pack.c’ (línea 856). La función lee un recuento de enumeración N de 2 bytes a través de ’dtoh16o(data, poffset)’ sin verificar que queden 2 bytes en el búfer. La función estándar ’ptp_unpack_DPD()’ en la línea 704 tiene esta verificación exacta, lo que confirma que la variante de Sony lo omitió por descuido. El commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 soluciona el problema. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'gphoto', 'product': 'libgphoto2', 'versions': [{'status': 'affected', 'version': '<= 2.5.33'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40338', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-20T16:13:41.644804Z'} -
New CVE Received by [email protected]
Apr. 18, 2026
Action Type Old Value New Value Added Description libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in the PTP_DPFF_Enumeration case of `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 856). The function reads a 2-byte enumeration count N via `dtoh16o(data, *poffset)` without verifying that 2 bytes remain in the buffer. The standard `ptp_unpack_DPD()` at line 704 has this exact check, confirming the Sony variant omitted it by oversight. Commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 fixes the issue. Added CVSS V3.1 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L Added CWE CWE-125 Added Reference https://github.com/gphoto/libgphoto2/commit/3b9f9696be76ae51dca983d9dd8ce586a2561845 Added Reference https://github.com/gphoto/libgphoto2/security/advisories/GHSA-2hwp-w84q-27hf