CVE-2026-40336 libgphoto2 has memory leak in ptp_unpack_Sony_DPD() secondary enumeration list in ptp-pack.c
A memory leak in libgphoto2 allows attackers to cause denial of service by triggering repeated property descriptor parsing.
- 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-2026-40336?
CVE-2026-40336 is a low-severity denial of service 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 a memory leak in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (lines 884–885). When processing a secondary enumeration list (introduced in 2024+ Sony cameras), the function overwrites dpd->FORM.Enum.SupportedValue with a new calloc() without freeing the previous allocation from line 857. The original array and any string values it contains are leaked on every property descriptor parse. Commit 404ff02c75f3cb280196fc260a63c4d26cf1a8f6 fixes the issue.
Weakness: CWE-401
Which versions are affected by CVE-2026-40336?
How do I fix CVE-2026-40336?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-40336 being exploited?
There is no known exploitation of CVE-2026-40336 in the wild and no public exploit code.
Sources
Also known as AZL-83009, DEBIAN-CVE-2026-40336, GHSA-g8xw-p5wj-mrxv, UBUNTU-CVE-2026-40336.