Description
A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | tnef | ≤ 1.4.18 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tnef | No fix yet | — |
| Debian 13 | tnef | No fix yet | — |
| Debian 12 | tnef | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tnef | No fix yet | — |
| Ubuntu 26.04 LTS | tnef | No fix yet | — |
| Ubuntu 24.04 LTS | tnef | No fix yet | — |
| Ubuntu 22.04 LTS | tnef | No fix yet | — |
| Ubuntu 20.04 LTS | tnef | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | tnef | No fix yet | — |
| Ubuntu 16.04 LTS | tnef | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-103679 vdb-entry
- RHBZ#2544477 issue-tracking
- https://github.com/verdammelt/tnef