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Fencer Intel
medium 5.2

CVE-2026-40339 json

libgphoto2 has OOB read in ptp_unpack_Sony_DPD() FormFlag parsing in ptp-pack.c

published 6mo ago modified 15d ago also EUVD-2026-23607

cvss
5.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 842). The function reads the FormFlag byte via `dtoh8o(data, *poffset)` without a prior bounds check. The standard `ptp_unpack_DPD()` at lines 686–687 correctly validates `*offset + sizeof(uint8_t) > dpdlen` before this same read, but the Sony variant omits this check entirely. Commit 09f8a940b1e418b5693f5c11e3016a1ad2cea62d fixes the issue.

Patch / fix

  • libgphoto2 Debian 14 2.5.34-1

debian advisories DEBIAN-CVE-2026-40339

  • libgphoto2 Ubuntu 22.04 LTS 2.5.27-1ubuntu0.1
  • libgphoto2 Ubuntu 24.04 LTS 2.5.31-2.1ubuntu1.1
  • libgphoto2 Ubuntu 26.04 LTS 2.5.33-1ubuntu1.1

ubuntu advisories UBUNTU-CVE-2026-40339

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libgphoto2 openSUSE Tumbleweed 2.5.34-1.1

opensuse advisories openSUSE-SU-2026:10916-1

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-40339 updated cvss 5.0

libgphoto2: libgphoto2: Information Disclosure via out-of-bounds read

  • Red Hat Enterprise Linux 6 libgphoto2 Red Hat Enterprise Linux 7 libgphoto2 Red Hat Enterprise Linux 8 libgphoto2 Red Hat Enterprise Linux 9 libgphoto2 Red Hat Enterprise Linux 10 libgphoto2
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6mo ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.2 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected products

  • gphoto libgphoto2

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.