Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-94184: A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | fetchmail | 0:6.5.7-1.amzn2023.0.1 |
| Amazon Linux · 2023 | fetchmail-debuginfo | 0:6.5.7-1.amzn2023.0.1 |
| Amazon Linux · 2023 | fetchmail-debugsource | 0:6.5.7-1.amzn2023.0.1 |
Vulnerabilities 1
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Medium 5.3
Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)
A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while b…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-94184.html