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.