CVE-2026-40338

MEDIUMNVD 5.25.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.2 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in the PTP_DPFF_Enumeration case of ptp_unpack_Sony_DPD() in camlibs/ptp2/ptp-pack.c (line 856). The function reads a 2-byte enumeration count N via dtoh16o(data, *poffset) without verifying that 2 bytes remain in the buffer. The standard ptp_unpack_DPD() at line 704 has this exact check, confirming the Sony variant omitted it by oversight. Commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 fixes the issue.

CVSS v3
5.2
EG Score
5.2(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity52% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

April 18, 2026

Last Modified

April 20, 2026

Advisory Details (2)

Auto-updated Aug 3, 2026
Patch available. Sources: github_commit, github.
github Patch Available

OOB read in ptp_unpack_Sony_DPD() enumeration count parsing in ptp-pack.c · Advisory · gphoto/libgphoto2 · GitHub

https://github.com/gphoto/libgphoto2/security/advisories/GHSA-2hwp-w84q-27hf
github_commit Patch Available

commit 3b9f9696be76 (gphoto/libgphoto2)

Patch available: gphoto/libgphoto2 v2.5.34 (contains commit 3b9f9696be76)

https://github.com/gphoto/libgphoto2/commit/3b9f9696be76ae51dca983d9dd8ce586a2561845

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libgphoto22.5.27-1 ... 2.5.33-1 (11 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libgphoto22.5.30-1 ... 2.5.33-1 (9 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libgphoto22.5.31-4, 2.5.32-1, 2.5.33-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libgphoto22.5.31-4, 2.5.32-1, 2.5.33-1——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
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  1. 2026-08-17 13:47 UTCEPSS rescore
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  4. 2026-08-16 06:28 UTCVendor advisory
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  7. 2026-08-15 02:30 UTCVendor advisory
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  10. 2026-08-14 04:36 UTCVendor advisory
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  13. 2026-08-12 22:32 UTCVendor advisory
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  19. 2026-08-11 02:32 UTCVendor advisory
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  22. 2026-08-10 01:49 UTCVendor advisory
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  25. 2026-08-09 03:52 UTCVendor advisory
  26. 2026-08-08 16:37 UTCEPSS rescore
  27. 2026-08-07 19:17 UTCEG score recompute
  28. 2026-08-07 19:17 UTCVendor advisory
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  30. 2026-08-06 21:23 UTCVendor advisory
  31. 2026-08-06 13:46 UTCEPSS rescore
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  38. 2026-08-03 21:29 UTCVendor advisory
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  41. 2026-08-02 13:00 UTCVendor advisory
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-40338?
CVE-2026-40338 is a medium vulnerability published on April 18, 2026. libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in the PTPDPFFEnumeration case of ptpunpackSonyDPD() in camlibs/ptp2/ptp-pack.c (line 856). The function reads a 2-byte enumeration count N via dtoh16o(data, *poffset) without verifying…
When was CVE-2026-40338 disclosed?
CVE-2026-40338 was first published in the National Vulnerability Database on April 18, 2026, with the most recent update on April 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40338 actively exploited?
CVE-2026-40338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.3% of all scored CVEs.
What is the CVSS score of CVE-2026-40338?
CVE-2026-40338 has a CVSS v3 base score of 5.2 (NVD).
How do I remediate CVE-2026-40338?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40338, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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