CVE-2025-65805: OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages

Q: How do I fix CVE-2025-65805?

oai-cn5g-amf: upgrade to newer than 2.1.9. Exact commands for each OS are on this page.

Q: Is CVE-2025-65805 being exploited?

CVE-2025-65805 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-65805 affect?

CVE-2025-65805 affects oai-cn5g-amf. Severity is high (CVSS 7.5). OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages. Unauthorized remote attackers can launch a denial-of-service attack and potentially execute malicious code by accessing port N1 and sending an

Q: How urgent is CVE-2025-65805?

Priority 42/100. High severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2025-65805 is a high-severity flaw (CVSS 7.5) affecting oai-cn5g-amf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages. Unauthorized remote attackers can launch a denial-of-service attack and potentially execute malicious code by accessing port N1 and sending an imsi string longer than 1000 to AMF.

Why this priority

High severity
CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-01-07
Last modified	2026-10-24

Publisher (CNA): MITRE · Vendor: openairinterface

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-07 17:16 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

openairinterface oai-cn5g-amf UPGRADE

Affected: <= 2.1.9

Fixed in: newer than 2.1.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy oai-cn5g-amf || rpm -q oai-cn5g-amf || oai-cn5g-amf --version

2. UPGRADE to newer than 2.1.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade oai-cn5g-amf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade oai-cn5g-amf

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-65805?

oai-cn5g-amf: upgrade to newer than 2.1.9. Exact commands for each OS are on this page.

Is CVE-2025-65805 being exploited?

CVE-2025-65805 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-65805 affect?

CVE-2025-65805 affects oai-cn5g-amf. Severity is high (CVSS 7.5). OpenAirInterface CN5G AMF<=v2.1.9 has a buffer overflow vulnerability in processing NAS messages. Unauthorized remote attackers can launch a denial-of-service attack and potentially execute malicious code by accessing port N1 and sending an

How urgent is CVE-2025-65805?

Priority 42/100. High severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

References

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