libgphoto2 missing null termination in ptp_unpack_Canon_FE() filename buffer in ptp-pack.c

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Summary

CVECVE-2026-40334
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-18 00:16:37 UTC
Updated2026-04-18 00:16:37 UTC
Descriptionlibgphoto2 is a camera access and control library. In versions up to and including 2.5.33, a missing null terminator exists in ptp_unpack_Canon_FE() in camlibs/ptp2/ptp-pack.c (line 1377). The function copies a filename into a 13-byte buffer using strncpy without explicitly null-terminating the result. If the source data is exactly 13 bytes with no null terminator, the buffer is left unterminated, leading to out-of-bounds reads in any subsequent string operation. Commit 259fc7d3bfe534ce4b114c464f55b448670ab873 patches the issue.

Risk And Classification

Primary CVSS: v3.1 3.5 LOW from [email protected]

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

Problem Types: CWE-170 | CWE-170 CWE-170: Improper Null Termination

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.5LOWCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
3.1CNADECLARED3.5LOWCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gphoto Libgphoto2 affected <= 2.5.33 Not specified

References

ReferenceSourceLinkTags
github.com/gphoto/libgphoto2/security/advisories/GHSA-ph87-cc3j-c6hm [email protected] github.com
github.com/gphoto/libgphoto2/commit/259fc7d3bfe534ce4b114c464f55b448670a... [email protected] github.com
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