CVE-2026-40335
CVE-2026-40335 is a medium-severity vulnerability with a CVSS 3.x base score of 5.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Medium (CVSS 3.x base score 5.2)
- EPSS exploit prediction: 0% (10th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-23586
- Weakness: CWE-125
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-40335?
- 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.
- How severe is CVE-2026-40335?
- CVE-2026-40335 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.
- Is CVE-2026-40335 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-40335?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-40335 have an EU (EUVD) identifier?
- Yes. CVE-2026-40335 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23586.
- When was CVE-2026-40335 published?
- CVE-2026-40335 was published on 2026-04-18 and last updated on 2026-06-17.
References
- https://github.com/gphoto/libgphoto2/commit/433bde9888d70aa726e32744cd751d7dbe94379a
- https://github.com/gphoto/libgphoto2/security/advisories/GHSA-g4g5-c2x9-cqfj
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