CVE-2026-94184— Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 bu
Affected Version Matrix 5
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 8 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 9 | any |
affected |
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I. Basic Information for CVE-2026-94184
Vulnerability Information
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Vulnerability Title
Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Affects v5.0.8 through v6.6.6.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
II. Public POCs for CVE-2026-94184
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-94184 (2)
Mailing List Discussions for CVE-2026-94184 (1)
Other References for CVE-2026-94184 (1)
Same Patch Batch · Red Hat · 2026-09-21 · 13 CVEs total
| CVE-2026-92574 | 8.8 HIGH | Cri-o: cri-o checkpoint restore bypasses destination security context |
| CVE-2026-80110 | 8.1 HIGH | Pki-core: dogtag pki v2 rest acl filter's reverse-lexicographic tie-break lets a ca agent |
| CVE-2026-15801 | 8.0 HIGH | Cri-o: cri-o: insufficient validation during container checkpoint restore |
| CVE-2026-94449 | 7.5 HIGH | Quarkus-smallrye-fault-tolerance: quarkus-smallrye-fault-tolerance: memory leak in @applyg |
| CVE-2026-75939 | 7.4 HIGH | Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before |
| CVE-2026-94368 | 7.1 HIGH | Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-co |
| CVE-2026-94215 | 5.5 MEDIUM | Keycloak-services: keycloak-services: cross-realm client read/write via request-level cach |
| CVE-2026-93433 | 5.5 MEDIUM | Libstoragemgmt: libstoragemgmt: denial of service via stack buffer overflow in scsi vpd pa |
| CVE-2026-94213 | 4.9 MEDIUM | Keycloak-services: keycloak-services: authorization services policy evaluation endpoint le |
| CVE-2026-92382 | 4.1 MEDIUM | Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads t |
| CVE-2026-94217 | 3.5 LOW | Keycloak-services: keycloak-services: uma scope merge across resource owners via resource |
| CVE-2026-94218 | 3.1 LOW | Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication sess |
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V. Comments for CVE-2026-94184
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