CVE-2026-103680

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Source

https://cve.org/CVERecord?id=CVE-2026-103680

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103680.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-103680

Downstream

Published

2026-10-01T11:34:51Z

Modified

2026-10-03T03:46:08Z

Severity

3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator

Summary

Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation

Details

A flaw was found in tnef. A heap-based buffer overflow can occur in the find_free_number() function when generating numbered backup suffixes for duplicate filenames. When numbered backups are enabled and file overwriting is disabled, an attacker can supply a specially crafted Transport Neutral Encapsulation Format (TNEF) file with an excessive number of colliding attachment filenames, causing the numeric counter to write past the allocated memory buffer. This issue may result in an application crash, leading to a Denial of Service (DoS), or potentially arbitrary code execution.

Database specific

{
    "cna_assigner":  "fedora",
    "cwe_ids":  [
        "CWE-787"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103680.json"
}

References

Affected packages

Git / github.com/verdammelt/tnef

Affected ranges

Type

GIT

Repo

https://github.com/verdammelt/tnef

Events

Introduced

Last Affected

8edd0e046736764c6decc8cd6e0e739438408f3e

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "last_affected":  "1.4.18"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

1.*

1.4.10

1.4.11

1.4.12

1.4.14

1.4.15

1.4.16

1.4.17

1.4.18

TNEF-1.*

TNEF-1.4.10

TNEF-1.4.11

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103680.json"