CVE-2026-40686
Description
A flaw was found in Exim when UTF-8 operators are enabled. A remote attacker could exploit this by sending malformed UTF-8 header data with large trailing characters, leading to an out-of-bounds read. This vulnerability may result in information disclosure within an error message, potentially revealing sensitive data during the handling of an unrelated email message.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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