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TI-2026-83934 Aliases CVE-2026-117069GHSA-xg9f-qw22-p2qc

Integer truncation in OpenAirInterface CN5G AMF enables DoS

Priority HIGH 72CWE-197Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

OpenAirInterface (OAI) CN5G AMF v2.2.1 has an integer truncation flaw (CWE-197) in its NAS decoder. The Type6NasIe::Validate() function truncates a 32-bit length to 16 bits, which bypasses length checks and causes an out-of-bounds heap read. An unauthenticated remote attacker can send crafted NAS Registration Requests with a malformed IMEISV to crash the AMF process.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

An integer truncation vulnerability in the NAS decoder of OpenAirInterface (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a denial of service (DoS) via crafted NAS Registration Requests containing a malformed IMEISV in the 5GS Mobile Identity IE. The Type6NasIe::Validate() function truncates a 32-bit length value to 16 bits, bypassing length validation and causing an out-of-bounds heap read in DecodeImeisv(), which can crash the AMF process.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00454 39th 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
Poc
Automatable
Yes
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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for OpenAirInterface (OAI) CN5G AMF.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-117069
  2. 2026-11-02 Alias added: GHSA-xg9f-qw22-p2qc
  3. 2026-11-03 CVSS score added · CISA ADP
  4. 2026-11-03 Weakness changed · CISA ADP
  5. 2026-11-03 CISA SSVC decision points changed
  6. 2026-11-03 Priority changed: LOW → HIGH

References

Other 2

Sources

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