Upstream information

CVE-2026-40687 at MITRE

Description

In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.

SUSE information

Overall state of this security issue: Revisit

This issue is currently rated as having critical severity.

CVSS v3 Scores
CVSS detail CNA (MITRE) National Vulnerability Database
Base Score 4.8 9.1
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector Network Network
Attack Complexity High Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact Low High
Integrity Impact None None
Availability Impact Low High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1263677 [NEW]

No SUSE Security Announcements cross referenced.

SUSE Timeline for this CVE

CVE page created: Wed Apr 29 16:00:22 2026
CVE page last modified: Sat May 2 11:25:31 2026