free5GC AMF denial of service vulnerability

published 2023-12-22 2 y ago modified 2026-06-17 4 mo ago also GHSA-jcrr-rr6w-8c83 , EUVD-2023-3232

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

An issue was discovered in free5GC version 3.3.0, allows remote attackers to execute arbitrary code and cause a denial of service (DoS) on AMF component via crafted NGAP message.

Patch / fix

links 1

github.com/free5gc/amf@6fc612c commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-02-27)

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/free5gc/free5gc/issues/497 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/free5gc/amf	<=1.2.0	no fix listed

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

github.com /free5gc/amf/commit/6fc612c35997cf4e8be1e5c86ae2242f04b576a9
web
github.com /free5gc/free5gc/issues/497
web, exploit, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-49391
advisory
github.com /free5gc/amf
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary