CVE-2026-40339

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Source
https://cve.org/CVERecord?id=CVE-2026-40339
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40339.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40339
Aliases
  • GHSA-42cm-m9hc-r7q8
Downstream
Related
Published
2026-04-17T23:42:32.586Z
Modified
2026-07-21T23:32:05.733387Z
Severity
  • 5.2 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L CVSS Calculator
Summary
libgphoto2 has OOB read in ptp_unpack_Sony_DPD() FormFlag parsing in ptp-pack.c
Details

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_Sony_DPD() in camlibs/ptp2/ptp-pack.c (line 842). The function reads the FormFlag byte via dtoh8o(data, *poffset) without a prior bounds check. The standard ptp_unpack_DPD() at lines 686–687 correctly validates *offset + sizeof(uint8_t) > dpdlen before this same read, but the Sony variant omits this check entirely. Commit 09f8a940b1e418b5693f5c11e3016a1ad2cea62d fixes the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40339.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/gphoto/libgphoto2

Affected ranges

Type
GIT
Repo
https://github.com/gphoto/libgphoto2
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
09f8a940b1e418b5693f5c11e3016a1ad2cea62d
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.5.33"
        }
    ]
}

Affected versions

Other
libgphoto2-2_5_0-release
libgphoto2-2_5_1-release
libgphoto2-2_5_10-release
libgphoto2-2_5_11-release
libgphoto2-2_5_12-release
libgphoto2-2_5_13-release
libgphoto2-2_5_14-release
libgphoto2-2_5_15-release
libgphoto2-2_5_16-release
libgphoto2-2_5_17-release
libgphoto2-2_5_18-release
libgphoto2-2_5_19-release
libgphoto2-2_5_1_1-release
libgphoto2-2_5_2-release
libgphoto2-2_5_20-release
libgphoto2-2_5_21-release
libgphoto2-2_5_22-release
libgphoto2-2_5_23-release
libgphoto2-2_5_24-release
libgphoto2-2_5_25-release
libgphoto2-2_5_26-release
libgphoto2-2_5_27-release
libgphoto2-2_5_28-release
libgphoto2-2_5_29-release
libgphoto2-2_5_3-release
libgphoto2-2_5_30-release
libgphoto2-2_5_31-release
libgphoto2-2_5_32-release
libgphoto2-2_5_3_1-release
libgphoto2-2_5_4-release
libgphoto2-2_5_5-release
libgphoto2-2_5_5_1-release
libgphoto2-2_5_6-release
libgphoto2-2_5_7-release
libgphoto2-2_5_8-release
libgphoto2-2_5_9-release
v2.*
v2.5.24
v2.5.25
v2.5.26
v2.5.27
v2.5.28
v2.5.29
v2.5.30
v2.5.31
v2.5.32

Database specific

vanir_signatures_modified 
"2026-07-21T23:32:05Z"
vanir_signatures 
[
    {
        "signature_type": "Function",
        "target": {
            "file": "camlibs/ptp2/ptp-pack.c",
            "function": "ptp_unpack_Sony_DPD"
        },
        "deprecated": false,
        "source": "https://github.com/gphoto/libgphoto2/commit/09f8a940b1e418b5693f5c11e3016a1ad2cea62d",
        "id": "CVE-2026-40339-3b42a887",
        "signature_version": "v1",
        "digest": {
            "function_hash": "96800853065275638778436644108844897536",
            "length": 4248.0
        }
    },
    {
        "signature_type": "Line",
        "target": {
            "file": "camlibs/ptp2/ptp-pack.c"
        },
        "deprecated": false,
        "source": "https://github.com/gphoto/libgphoto2/commit/09f8a940b1e418b5693f5c11e3016a1ad2cea62d",
        "id": "CVE-2026-40339-854fd3f4",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "150045175810682455768180707033109754229",
                "157310575779410390658294844073745413854",
                "232103645227817086041675545705809225954",
                "51195960220326945294876332022813588033",
                "317063548928842063853640988915940179683"
            ],
            "threshold": 0.9
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40339.json"