7.5

CVE-2026-1976: Free5GC SMF SessionDeletionResponse null pointer dereference

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

Vulnerability summary

CVE-2026-1976 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 weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address 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