PT-2026-5399 · Unknown · Free5Gc Smf

Ziyulin · Published 2026-01-30 · Updated 2026-02-23 · CVE-2026-1682

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 prior to 4.1.1

Description A flaw exists in Free5GC SMF, specifically within the PFCP UDP Endpoint component. The issue resides in the HandlePfcpAssociationReleaseRequest function located in the file internal/pfcp/handler/handler.go. A manipulation can lead to a null pointer dereference, potentially allowing for remote exploitation. An exploit for this issue has been published.

Recommendations Update Free5GC SMF to version 4.1.1 or later. As a temporary workaround, consider disabling the HandlePfcpAssociationReleaseRequest function until a patch is available.

Exploit

Fix

NULL Pointer Dereference

Improper Resource Release

Weakness Enumeration

CWE-476

CWE-404

Related Identifiers

CVE-2026-1682

Affected Products

Free5Gc Smf

References · 15

• 🔥 https://github.com/free5gc/free5gc/issues/794#issue-3811888505 · Exploit
• https://github.com/free5gc/free5gc/issues/794 · Vendor Advisory
• https://github.com/free5gc/smf/pull/188 · Patch
• https://osv.dev/vulnerability/CVE-2026-1682 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1682 · Security Note
• https://github.com/free5gc/free5gc/issues/794#issuecomment-3761063382 · Note
• https://vuldb.com/?id.343475 · Note
• https://t.me/CVEtracker/43284 · Telegram Post
• https://vuldb.com/?ctiid.343475 · Note
• https://vuldb.com/?submit.739508 · Note
• https://github.com/free5gc/smf · Note
• https://t.me/cveNotify/150401 · Telegram Post
• https://t.me/cveNotify/152829 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2017247178478006606 · Twitter Post
• https://twitter.com/CVEnew/status/2017244561148408186 · Twitter Post