Buffer overflow in Red Hat Enterprise Linux 10
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.012 (68.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.012 · change: +0.004
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-94184 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- gitlab.com/fetchmail/fetchmail/-/commit/cb5be5c38471eec19e519ace0bc569176317ea92
- www.fetchmail.info/fetchmail-SA-2026-01.txt
- www.openwall.com/lists/oss-security/2026/06/27/8
- af854a3a-2127-422b-91ae-364da2661108
- bugzilla.redhat.com/show_bug.cgi
- access.redhat.com/errata/RHSA-2026:85959 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:86982 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:86981 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-94184?
- CVE-2026-94184 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Stack-based Buffer Overflow. CVSS score: 5.3/10. Published 2026-09-21.
- How severe is CVE-2026-94184?
- Medium severity. CVSS v3 base score is 5.3 out of 10.