CVE-2026-40684

MEDIUM

5.9

Beschreibung

In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.

CVE Details

CVSS v3.1 Bewertung5.9

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

AngriffsvektorNETWORK

KomplexitatHIGH

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht4/30/2026

Zuletzt geandert5/1/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

exim:exim

Schwachen (CWE)

CWE-684

Referenzen

https://code.exim.org/exim/exim/commit/628bbaca7672748d941a12e7cd5f0122a4e18c81(cve@mitre.org)

https://exim.org/static/doc/security/CVE-2026-40684.txt(cve@mitre.org)

https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40684.assessment(cve@mitre.org)

https://www.openwall.com/lists/oss-security/2026/04/30/21(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2026/05/01/11(af854a3a-2127-422b-91ae-364da2661108)

IOC Korrelationen

Keine Korrelationen erfasst

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