CVE-2026-40339: medium-severity vulnerability in gphoto libgphoto2
libgphoto2 has OOB read in ptp_unpack_Sony_DPD() FormFlag parsing in ptp-pack.c
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.2epss 0.2%
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.
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Affected products
gphoto · libgphoto2Related CVEs — gphoto libgphoto2
In the same product, most dangerous first.
CVE-2026-40340MEDIUMlibgphoto2 has OOB read in ptp_unpack_OI() in ptp-pack.c via malicious PTP ObjectInfo responseEPSS 0.2%CVE-2026-40333MEDIUMlibgphoto2 has OOB read in ptp_unpack_EOS_ImageFormat() and ptp_unpack_EOS_CustomFuncEx() due to missing length parameter in ptp-pack.cEPSS 0.2%CVE-2026-40338MEDIUMlibgphoto2 has OOB read in ptp_unpack_Sony_DPD() enumeration count parsing in ptp-pack.cEPSS 0.2%CVE-2026-40335MEDIUMlibgphoto2 has OOB read in ptp_unpack_DPV() UINT128/INT128 handling in ptp-pack.cEPSS 0.2%CVE-2026-40341LOWlibgphoto2 has an OOB Read in ptp_unpack_EOS_FocusInfoExEPSS 0.2%CVE-2026-40334LOWlibgphoto2 missing null termination in ptp_unpack_Canon_FE() filename buffer in ptp-pack.cEPSS 0.2%