Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value
A flaw was found in tnef. An attacker can exploit this vulnerability by providing a specially crafted file containing uncompressed Rich Text Format (RTF) data. Because the application fails to properly validate input buffer boundaries before copying data in get_rtf_data_from_buf(), reading beyond the allocated memory occurs. This flaw can cause the application to crash, leading to a Denial of Service (DoS), or leak sensitive memory contents into extracted output files.
CVE-2026-103678
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-103678
Structured affected-version data
Original package identities and version rules from this source.
[
{
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "1.4.18"
}
],
"packageName": "tnef",
"collectionURL": "https://github.com/verdammelt/tnef",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-103678
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #5302 · Revision 1
- Added to Heist Feed
- Publisher date