CVE-2026-40339

Description

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.

PUBLISHED Reserved 2026-04-10 | Published 2026-04-17 | Updated 2026-04-20 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

Product status

References

github.com/...photo2/security/advisories/GHSA-42cm-m9hc-r7q8

github.com/...ommit/09f8a940b1e418b5693f5c11e3016a1ad2cea62d

cve.org (CVE-2026-40339)

nvd.nist.gov (CVE-2026-40339)

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