CVE-2026-40386

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Source
https://cve.org/CVERecord?id=CVE-2026-40386
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40386.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40386
Downstream
Related
Published
2026-04-12T18:19:08.684Z
Modified
2026-08-12T16:24:04.475237Z
Severity
  • 4.0 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L CVSS Calculator
Summary
[none]
Details

In libexif through 0.6.25, an integer underflow in size checking for Fuji and Olympus MakerNote decoding could be used by attackers to crash or leak information out of libexif-using programs.

Database specific 
{
    "cna_assigner": "mitre",
    "cwe_ids": [
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40386.json"
}
References

Affected packages

Git / github.com/libexif/libexif

Affected ranges

Type
GIT
Repo
https://github.com/libexif/libexif
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
dc6eac6e9655d14d0779d99e82d0f5f442d2f34b
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.6.25"
        }
    ],
    "cpe": "cpe:2.3:a:libexif_project:libexif:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

Other
cvs-migration
libexif-0_5_7-rc2
libexif-0_5_7-rc3
libexif-0_5_7-rc4
libexif-0_5_7-release
libexif-0_5_9-release
libexif-0_6_12-release
libexif-0_6_14-release
libexif-0_6_15-release
libexif-0_6_16-release
libexif-0_6_17-release
libexif-0_6_18-release
libexif-0_6_19-release
libexif-0_6_20-release
libexif-0_6_21-release
libexif-0_6_22-release
libexif-0_6_23-release
libexif-0_6_24-release
libexif-0_6_25-release
libexif-before-0_6_0-api-change
v0.*
v0.6.23
v0.6.24
v0.6.25

Database specific

vanir_signatures 
[
    {
        "target": {
            "function": "exif_mnote_data_olympus_get_value",
            "file": "libexif/olympus/exif-mnote-data-olympus.c"
        },
        "signature_type": "Function",
        "deprecated": false,
        "signature_version": "v1",
        "source": "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "digest": {
            "function_hash": "89651194716944256166666105002455224126",
            "length": 292.0
        },
        "id": "CVE-2026-40386-5d76fe76"
    },
    {
        "target": {
            "function": "exif_mnote_data_fuji_get_value",
            "file": "libexif/fuji/exif-mnote-data-fuji.c"
        },
        "signature_type": "Function",
        "deprecated": false,
        "signature_version": "v1",
        "source": "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "digest": {
            "function_hash": "89651194716944256166666105002455224126",
            "length": 292.0
        },
        "id": "CVE-2026-40386-8c7e5880"
    },
    {
        "target": {
            "file": "libexif/olympus/exif-mnote-data-olympus.c"
        },
        "signature_type": "Line",
        "deprecated": false,
        "signature_version": "v1",
        "source": "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "134657048840523953532291051655678286599",
                "330620488256842591126409580115434617653",
                "318388110906489116545935652924689243310",
                "201666159675207808264155098465449719230"
            ]
        },
        "id": "CVE-2026-40386-970107f3"
    },
    {
        "target": {
            "file": "libexif/fuji/exif-mnote-data-fuji.c"
        },
        "signature_type": "Line",
        "deprecated": false,
        "signature_version": "v1",
        "source": "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "79348447117930777702955799481112448007",
                "228581815217580039735945598299510135846",
                "156379962593853258986688813785805367582",
                "86655364894345662921658811840849055363"
            ]
        },
        "id": "CVE-2026-40386-f3dbecf1"
    }
]
vanir_signatures_modified 
"2026-08-12T16:24:04Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40386.json"