CVE-2026-40335 libgphoto2 has OOB read in ptp_unpack_DPV() UINT128/INT128 handling in ptp-pack.c

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in ptpunpackDPV in camlibs/ptp2/ptp-pack.c lines 622–629. The UINT128 and INT128 cases advance offset += 16 without verifying that 16 bytes remain in the buffer. The entry check at li...