What is CVE-2026-40340?

CVE-2026-40340 is a medium-severity vulnerability in Gphoto Libgphoto2, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-04-17.

How severe is CVE-2026-40340?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Out-of-bounds Read in Gphoto Libgphoto2

CVE-2026-40340

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read vulnerability in `ptp_unpack_OI()` in `camlibs/ptp2/ptp-pack.c` (lines 530–563). The function validates `len < PTP_oi_Sequenc…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (1.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Gphoto Libgphoto2 — versions <= 2.5.33

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

https://github.com/gphoto/libgphoto2/security/advisories/GHSA-xfw3-xvjp-5wcv (x_refsource_CONFIRM)
https://github.com/gphoto/libgphoto2/commit/7c7f515bc88c3d0c4098ac965d313518e0ccbe33 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40340?: CVE-2026-40340 is a medium-severity vulnerability in Gphoto Libgphoto2, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-04-17.
How severe is CVE-2026-40340?: Medium severity. CVSS v3 base score is 6.1 out of 10.