What is CVE-2026-40336?

CVE-2026-40336 is a low-severity vulnerability in Gphoto Libgphoto2, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 2.4/10. Published 2026-04-18.

How severe is CVE-2026-40336?

Low severity. CVSS v3 base score is 2.4 out of 10.

Vulnerability in Gphoto Libgphoto2

CVE-2026-40336

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.

EPSS: 0.002 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Gphoto Libgphoto2 — versions <= 2.5.33

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40336?: CVE-2026-40336 is a low-severity vulnerability in Gphoto Libgphoto2, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 2.4/10. Published 2026-04-18.
How severe is CVE-2026-40336?: Low severity. CVSS v3 base score is 2.4 out of 10.