Numeric Range Comparison Without Minimum Check Affecting exim4 package, versions <4.99.3-2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-EXIM4-17098969
- published30 May 2026
- disclosed30 May 2026
Introduced: 30 May 2026
CVE-2026-48840 (opens in a new tab)How to fix?
Upgrade Debian:unstable exim4 to version 4.99.3-2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream exim4 package and not the exim4 package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.
References
- https://security-tracker.debian.org/tracker/CVE-2026-48840
- https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1
- https://www.openwall.com/lists/oss-security/2026/05/29/3
- http://www.openwall.com/lists/oss-security/2026/05/29/3
- https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html