7.5

CVE-2026-1973: Free5GC SMF establishPfcpSession null pointer dereference

Analyzed
Published 06-02-2026Last modified 23-02-2026

Vulnerability summary

CVE-2026-1973 is a high (CVSS 7.5) Improper Resource Shutdown or Release vulnerability in free5gc. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.6% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.61%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2github, reference

Timeline

  1. 06-02-2026
    PublishedVulnerability first disclosed.
  2. 23-02-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability was determined in Free5GC up to 4.1.0. The impacted element is the function establishPfcpSession of the component SMF. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. It is best practice to apply a patch to resolve this issue.

CVSS metrics

7 scores · 2 sources · 4 versions

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

Increase +0.06 pp

From 0.55% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • githubUnverified

    Free5Gc

    Maturity: poc

  • referenceUnverified

    Exploit Reference (vuldb.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Free5gc1 product

1 vendor · 1 product

References

7 links