CVE-2025-15539

Medium

Description

A vulnerability was determined in Open5GS up to 2.7.6. Impacted is the function sgwc_s11_handle_downlink_data_notification_ack of the file src/sgwc/s11-handler.c of the component sgwc. This manipulation causes denial of service. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b4707272c1caf6a7d4dca905694ea55557a0545f. To fix this issue, it is recommended to deploy a patch. The issue report is flagged as already-fixed.

SeverityMedium

CVSS5.3

Exploit probability—

ProductOpen5gs

PublishedJan 19, 2026

First seenJan 19, 2026

Weakness typeCWE-404CWE-404

How to fix

Patches

github.com/open5gs/open5gs/commit/b4707272c1caf6a7d4dca905694ea55557a0545f

Affected products

Product	Affected versions	Fixed in
open5gs open5gs	v ≤ 2.7.6	—

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