Open5GS up to 2.7.6 PGW S5U Address null pointer dereference

Summaryinfo

A vulnerability described as problematic has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response/sgwc_sxa_handle_session_modification_response of the component PGW S5U Address Handler. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2026-2062. The attack can be launched remotely. Moreover, an exploit is present. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Open5GS up to 2.7.6. Affected is the function sgwc_s5c_handle_modify_bearer_response/sgwc_sxa_handle_session_modification_response of the component PGW S5U Address Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-2062. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Applying the patch f1bbd7b57f831e2a070780a7d8d5d4c73babdb59 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: f1bbd7b57f831e2a070780a7d8d5d4c73babdb59

Timelineinfo

02/06/2026 Advisory disclosed
02/06/2026 +0 days VulDB entry created
02/12/2026 +6 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4257
Status: Confirmed

CVE: CVE-2026-2062 (🔒)
GCVE (CVE): GCVE-0-2026-2062
GCVE (VulDB): GCVE-100-344622
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/06/2026 07:43
Updated: 02/12/2026 08:47
Changes: 02/06/2026 07:43 (58), 02/07/2026 10:49 (31), 02/12/2026 08:47 (15)
Complete: 🔍
Submitter: FrankyLin
Cache ID: 216::103

Submitinfo

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