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Vulnerability · Published Apr 17, 2026 · Assigned by GitHub_M

CVE-2026-40335libgphoto2 has OOB read in ptp_unpack_DPV() UINT128/INT128 handling in ptp-pack.c

Medium 5.2

In plain English

A medium-severity out-of-bounds read in libgphoto2 from gphoto. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.2Medium
Exploit odds (30 days)0.2%top 90.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libgphoto2no fix listedDEBIAN-CVE-2026-40335
Debian:13libgphoto2no fix listedDEBIAN-CVE-2026-40335
Debian:14libgphoto22.5.34-1DEBIAN-CVE-2026-40335
Ubuntu:22.04:LTSlibgphoto22.5.27-1ubuntu0.1USN-8586-1
Ubuntu:22.04:LTSlibgphoto22.5.27-1ubuntu0.1UBUNTU-CVE-2026-40335
Ubuntu:24.04:LTSlibgphoto22.5.31-2.1ubuntu1.1USN-8586-1
Ubuntu:24.04:LTSlibgphoto22.5.31-2.1ubuntu1.1UBUNTU-CVE-2026-40335
Ubuntu:25.10libgphoto2no fix listedUBUNTU-CVE-2026-40335
Ubuntu:26.04:LTSlibgphoto22.5.33-1ubuntu1.1UBUNTU-CVE-2026-40335
Ubuntu:26.04:LTSlibgphoto22.5.33-1ubuntu1.1USN-8586-1

Affected products (as reported)

VendorProductVersions
gphoto libgphoto2 <= 2.5.33

Weakness: CWE-125 · Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

References