CVE-2026-40333

MEDIUM

libgphoto2 has OOB read in ptp_unpack_EOS_ImageFormat() and ptp_unpack_EOS_CustomFuncEx() due to missing length parameter in ptp-pack.c

Title source: cna

Description

libgphoto2 is a camera access and control library. In versions up to and including 2.5.33, two functions in camlibs/ptp2/ptp-pack.c accept a data pointer but no length parameter, performing unbounded reads. Their callers in ptp_unpack_EOS_events() have xsize available but never pass it, leaving both functions unable to validate reads against the actual buffer boundary. Commit 1817ecead20c2aafa7549dac9619fe38f47b2f53 patches the issue.

References (2)

Core 2

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/gphoto/libgphoto2/security/advisories/GHSA-hq94-cp6h-3gjp

X_Refsource_Misc x_refsource_misc

https://github.com/gphoto/libgphoto2/commit/1817ecead20c2aafa7549dac9619fe38f47b2f53

View Writeup ZIP pw:eip

Scores

CVSS v3 6.1

EPSS 0.0022

EPSS Percentile 12.2%

Attack Vector PHYSICAL

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-125

Status published

Products (1)

gphoto/libgphoto2 <= 2.5.33

Published Apr 18, 2026

Tracked Since Apr 18, 2026