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
ALSA (3)
AZL (1)
CLSA (5)
DEBIAN (1)
JLSEC (1)
MGASA (1)
OESA (1)
openSUSE (2)
RHSA (11)
RLSA (3)
ROOT (1)
SUSE (3)
UBUNTU (1)
Related
ALSA (3)
openSUSE (2)
SUSE (3)
Published
2026-04-12T18:19:08Z
Modified
2026-10-28T10:49:43Z
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":  [
        {
            "cpe":  "cpe:2.3:a:libexif_project:libexif:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "0.6.25"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "dc6eac6e9655d14d0779d99e82d0f5f442d2f34b"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

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

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40386.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "89651194716944256166666105002455224126",
            "length":  292
        },
        "id":  "CVE-2026-40386-5d76fe76",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "target":  {
            "file":  "libexif/olympus/exif-mnote-data-olympus.c",
            "function":  "exif_mnote_data_olympus_get_value"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "89651194716944256166666105002455224126",
            "length":  292
        },
        "id":  "CVE-2026-40386-8c7e5880",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "target":  {
            "file":  "libexif/fuji/exif-mnote-data-fuji.c",
            "function":  "exif_mnote_data_fuji_get_value"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "134657048840523953532291051655678286599",
                "330620488256842591126409580115434617653",
                "318388110906489116545935652924689243310",
                "201666159675207808264155098465449719230"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-40386-970107f3",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "target":  {
            "file":  "libexif/olympus/exif-mnote-data-olympus.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "79348447117930777702955799481112448007",
                "228581815217580039735945598299510135846",
                "156379962593853258986688813785805367582",
                "86655364894345662921658811840849055363"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-40386-f3dbecf1",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/libexif/libexif/commit/dc6eac6e9655d14d0779d99e82d0f5f442d2f34b",
        "target":  {
            "file":  "libexif/fuji/exif-mnote-data-fuji.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T10:49:43Z"