Bug 2542264 (CVE-2026-100890) - CVE-2026-100890 opendmarc: OpenDMARC: Denial of service via null pointer dereference in SPF parser
Summary: CVE-2026-100890 opendmarc: OpenDMARC: Denial of service via null pointer dere...
Keywords:
Status: NEW
Alias: CVE-2026-100890
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2542276 2542277
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-28 00:51 UTC by OSIDB Bzimport
Modified: 2026-09-28 02:43 UTC (History)
0 users

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Description OSIDB Bzimport 2026-09-28 00:51:18 UTC 
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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