Open5GS up to 2.7.6 SGWC src/sgwc/s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Open5GS up to 2.7.6. This issue affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. The manipulation leads to denial of service. This vulnerability is listed as CVE-2026-1522. The attack may be initiated remotely. In addition, an exploit is available. It is suggested to install a patch to address this issue. The issue report is flagged as already-fixed.

Detailsinfo

A vulnerability was found in Open5GS up to 2.7.6 and classified as problematic. This issue affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-1522. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept. The issue report is flagged as already-fixed.

Applying the patch b19cf6a is able to eliminate this problem. The bugfix is ready for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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

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

Exploitinginfo

Class: Denial of service
CWE: 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: b19cf6a

Timelineinfo

01/11/2026 Countermeasure disclosed
01/28/2026 +17 days Advisory disclosed
01/28/2026 +0 days VulDB entry created
02/03/2026 +6 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4266
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-1522 (🔒)
GCVE (CVE): GCVE-0-2026-1522
GCVE (VulDB): GCVE-100-343193
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/28/2026 11:19
Updated: 02/03/2026 09:35
Changes: 01/28/2026 11:19 (62), 01/29/2026 11:58 (31), 02/03/2026 09:35 (11)
Complete: 🔍
Submitter: FrankyLin
Cache ID: 216::103

Submitinfo

Accepted

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