Summary
Fetchmail is a remote mail retrieval and forwarding utility intended for use over on-demand TCP/IP links, like SLIP or PPP connections. Fetchmail supports every remote-mail protocol currently in use on the Internet (POP2, POP3, RPOP, APOP, KPOP, all IMAPs, ESMTP ETRN, IPv6, and IPSEC) for retrieval. Then Fetchmail forwards the mail through SMTP so the user can read it through their favorite mail client.
Security Fix(es):
* fetchmail: fetchmail: stack-based buffer overflow in NTLM authentication (fetchmail-SA-2026-01) (CVE-2026-94184)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 12
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 10 | fetchmail | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debuginfo | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debuginfo | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debuginfo | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debuginfo | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debugsource | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debugsource | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debugsource | 0:6.4.38-3.el10_2.1 |
| Rocky Linux · 10 | fetchmail-debugsource | 0:6.4.38-3.el10_2.1 |
Vulnerabilities 1
-
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…