Description
A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Trusted Domain Project | OpenDMARC | 1.4.0, 1.4.1, 1.4.2 | — |
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 | opendmarc | No fix yet | — |
| Debian 13 | opendmarc | No fix yet | — |
| Debian 12 | opendmarc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | opendmarc | No fix yet | — |
| Ubuntu 26.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 24.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 22.04 LTS | opendmarc | No fix yet | — |
| Ubuntu 20.04 LTS | opendmarc | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | opendmarc | No fix yet | — |
| Ubuntu Pro 16.04 LTS | opendmarc | No fix yet | — |
References
- VDB-411036 | Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow vdb-entry technical-description
- VDB-411036 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-101279 | CVE Analysis and Report third-party-advisory
- Submit #918280 | The Trusted Domain Project OpenDMARC 1.4.2 Integer Overflow third-party-advisory
- https://xuyongzhe-vt.github.io/share/dmarc-pct-integer-handling.html exploit