Open5GS up to 2.7.6 sgwc src/sgwc/s11-handler.c sgwc_s11_handle_downlink_data_notification_ack denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.70

Summaryinfo

A vulnerability was found in Open5GS up to 2.7.6. It has been declared as problematic. The affected element is the function sgwc_s11_handle_downlink_data_notification_ack of the file src/sgwc/s11-handler.c of the component sgwc. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2025-15539. The attack can be launched remotely. Moreover, an exploit is present. It is advisable to implement a patch to correct this issue. The issue report is flagged as already-fixed.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Open5GS up to 2.7.6. Affected by this issue is the function sgwc_s11_handle_downlink_data_notification_ack of the file src/sgwc/s11-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 for download at github.com. This vulnerability is handled as CVE-2025-15539. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1499.

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 b4707272c1caf6a7d4dca905694ea55557a0545f is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202601-2974). Once again VulDB remains the best source for 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: 6.4
VulDB Meta Temp Score: 6.1

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

Researcher Base Score: 7.5
Researcher Vector: 🔒

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: b4707272c1caf6a7d4dca905694ea55557a0545f

Timelineinfo

01/18/2026 Advisory disclosed
01/18/2026 +0 days VulDB entry created
02/11/2026 +24 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4230
Status: Confirmed

CVE: CVE-2025-15539 (🔒)
GCVE (CVE): GCVE-0-2025-15539
GCVE (VulDB): GCVE-100-341732
CNNVD: CNNVD-202601-2974 - Open5GS 安全漏洞

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/18/2026 08:38
Updated: 02/11/2026 01:52
Changes: 01/18/2026 08:38 (60), 01/19/2026 02:08 (31), 01/19/2026 07:46 (11), 01/19/2026 07:49 (4), 01/19/2026 17:48 (6), 02/11/2026 01:52 (11)
Complete: 🔍
Submitter: FrankyLin
Committer: FrankyLin
Cache ID: 216::103

Submitinfo

Accepted

Once again VulDB remains the best source for vulnerability data.

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