PT-2026-5400 · Free5Gc · Free5Gc Smf

Ziyulin · Published 2026-01-30 · Updated 2026-02-23 · CVE-2026-1683

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Free5GC SMF versions through 4.1.0

Description A flaw exists in Free5GC SMF that can lead to a denial of service. The issue is related to the HandlePfcpSessionReportRequest function within the PFCP component, specifically in the file internal/pfcp/handler/handler.go. Remote exploitation is possible, and the exploit has been publicly disclosed.

Recommendations Versions prior to 4.1.1 are affected. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

CVE-2026-1683

Affected Products

Free5Gc Smf

References · 14

• 🔥 https://github.com/free5gc/free5gc/issues/804#issue-3816086696 · Exploit
• 🔥 https://github.com/free5gc/free5gc/issues/804 · Exploit
• https://github.com/free5gc/smf/pull/188 · Patch
• https://osv.dev/vulnerability/CVE-2026-1683 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1683 · Security Note
• https://vuldb.com/?id.343476 · Note
• https://t.me/cveNotify/152830 · Telegram Post
• https://vuldb.com/?submit.739653 · Note
• https://github.com/free5gc/smf · Note
• https://vuldb.com/?ctiid.343476 · Note
• https://twitter.com/CVEnew/status/2017244560124985831 · Twitter Post
• https://vuldb.com/?submit.739654 · Note
• https://t.me/CVEtracker/43285 · Telegram Post
• https://t.me/cveNotify/150402 · Telegram Post