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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-40684

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

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Status
Published
Published
Updated
Assigning organization
mitre

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Exim Exim

Default version status: unaffected

  • 0 to < 4.99.2affected

References