Out-of-Bounds Affecting libopendkim-devel package, versions <0:2.11.0-0.42.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.29% (20th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBOPENDKIMDEVEL-20874521
  • published13 Oct 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

NewCVE-2026-100888  (opens in a new tab)
CWE-119  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libopendkim-devel to version 0:2.11.0-0.42.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3213.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libopendkim-devel package and not the libopendkim-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A weakness has been identified in Trusted Domain Project OpenDKIM up to 2.11.0. This affects the function dkim_canon_selecthdrs of the file libopendkim/dkim-canon.c of the component DKIM Signature Header Selection. Executing a manipulation of the argument h can lead to out-of-bounds write. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Base Scores

version 3.1