Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-aab8eaa2e3 advisory.

    This is new exim version fixing CVE-2025-67896.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-223569b08a advisory.

    This is new exim version fixing CVE-2025-67896.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer     overflow because database records are cast directly to internal structures without validation.
    (CVE-2025-67896)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
294792	Fedora 42 : exim (2026-aab8eaa2e3)	Nessus	Fedora Local Security Checks	Local	critical
294774	Fedora 43 : exim (2026-223569b08a)	Nessus	Fedora Local Security Checks	Local	critical
278629	Linux Distros Unpatched Vulnerability : CVE-2025-67896	Nessus	Misc.	Local	critical

Detections

Analytics

CVE-2025-67896

critical

Tenable Plugins

critical

critical

critical