CVE-2026-101014
Publication date 29 September 2026
Last updated 30 September 2026
Ubuntu priority
Description
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Performing a manipulation results in off-by-one. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae. To fix this issue, it is recommended to deploy a patch.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| opendmarc | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version:
Base score
5.5 · Medium
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Base score
7.3 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-101014
- https://github.com/trusteddomainproject/OpenDMARC/pull/188
- https://github.com/trusteddomainproject/OpenDMARC/pull/344
- https://github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a27c71e7369bdedc62ae
- https://vuldb.com/cve/CVE-2026-101014
- https://vuldb.com/submit/917100
- https://vuldb.com/vuln/410884
- https://vuldb.com/vuln/410884/cti
- https://weitongli.com/share/opendmarc-cleanup-off-by-one.html