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TI-2022-03174 Aliases CVE-2022-3437

Heap-based buffer overflow in samba

Priority LOW 35CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03827 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—sambaFixed in samba 4.15.11, samba 4.16.6, samba 4.17.2.—No fix listedCNA
  • samba Vendor— Affected Fixed in samba 4.15.11, samba 4.16.6, samba 4.17.2. Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*4.0.0 to before 4.15.11; 4.16.0 to before 4.16.6; 4.17.0 to before 4.17.2VulnerableSamba
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.15.11; 4.16.0 to before 4.16.6; 4.17.0 to before 4.17.2 Vulnerable ·Samba
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Storage 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-3437
  2. 2026-10-23 EPSS moved to the 90th–95th percentile

References

Advisory 5

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences