CVE-2026-40335 libgphoto2 has OOB read in ptp_unpack_DPV() UINT128/INT128 handling in ptp-pack.c
An out-of-bounds read in libgphoto2 allows attackers to read memory or cause crashes via crafted PTP data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40335?
CVE-2026-40335 is a medium-severity memory corruption vulnerability in libgphoto2, published on 17 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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_DPV()` 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 line 609 only guarantees `*offset < total` (at least 1 byte available), leaving up to 15 bytes unvalidated. Commit 433bde9888d70aa726e32744cd751d7dbe94379a patches the issue.
Weakness: CWE-125
Which versions are affected by CVE-2026-40335?
How do I fix CVE-2026-40335?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-40335 being exploited?
There is no known exploitation of CVE-2026-40335 in the wild and no public exploit code.
Sources
Also known as AZL-83018, DEBIAN-CVE-2026-40335, GHSA-g4g5-c2x9-cqfj, UBUNTU-CVE-2026-40335.