CVE-2026-40341

Application crash via premature FocusInfoEx header reads

Published Apr 17, 2026 · Updated Apr 17, 2026

Buffer over-read in gPhoto libgphoto2 2.5.33 and earlier allows physically proximate attackers to crash the library via a USB device. ptp_unpack_EOS_FocusInfoEx reads the 20-byte FocusInfoEx header fields before verifying that the supplied buffer contains enough data. A connected untrusted USB device can therefore interrupt any camera-facing application process that reaches this PTP parser.

CVSS severity3.5
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer over-read in gPhoto libgphoto2 2.5.33 and earlier allows physically proximate attackers to crash the library via a USB device. ptp_unpack_EOS_FocusInfoEx reads the 20-byte FocusInfoEx header fields before verifying that the supplied buffer contains enough data. A connected untrusted USB device can therefore interrupt any camera-facing application process that reaches this PTP parser.

The record

CVE
CVE-2026-40341
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
gPhoto
Product
libgphoto2
Classifications
CWE-126, T1499
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.5.33

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

gPhoto · libgphoto2version=<= 2.5.33

Published CVSS scores

3.5GitHub, Inc.CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo