Veille CVE
CVE-2026-40684
7.5 ÉlevéeDescription
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.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 5.9 Moyenne | cve@mitre.org | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 7.5 Élevée | nvd@nist.gov (NVD) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Faiblesses (CWE)
Références
- https://code.exim.org/exim/exim/commit/628bbaca7672748d941a12e7cd5f0122a4e18c81 Patch
- https://exim.org/static/doc/security/CVE-2026-40684.txt Broken Link
- https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40684.assessment Vendor Advisory
- https://www.openwall.com/lists/oss-security/2026/04/30/21 Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/01/11