Bug 2542380 (CVE-2026-101017)
| Summary: | CVE-2026-101017 opendmarc: OpenDMARC: Denial of Service via NULL pointer dereference during subdomain walking in opendmarc_policy.c | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in OpenDMARC. A NULL pointer dereference occurs in the strcasecmp call within libopendmarc/opendmarc_policy.c during subdomain walking when processing Domain-based Message Authentication, Reporting, and Conformance (DMARC) records. A remote attacker could exploit this flaw by sending a specially crafted email that triggers the subdomain walking code path, potentially causing the OpenDMARC milter process to crash, resulting in a denial of service (DoS).
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2542397, 2542398 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-09-28 09:21:27 UTC
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