Buffer overflow in Open5gs
CVE-2026-78157
A vulnerability was detected in Open5GS 2.8.0. This affects the function pcrf_rx_aar_cb of the file src/pcrf/pcrf-rx-path.c of the component Rx AA-Request Handler. Performing a manipulation results in out-of-bounds read. It is possible to initiate the attack remotely. The patch is named c18dc6938bf63cc7374315d3dca303d92066e746. To fix this issue, it is recommended to deploy a patch.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (32.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Open5gs — versions 2.8.0
Weakness classification (CWE)
References
- vuldb.com/vuln/394540 (technical-description, vdb-entry)
- vuldb.com/vuln/394540/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-78157 (third-party-advisory)
- vuldb.com/submit/882953 (third-party-advisory)
- github.com/open5gs/open5gs/issues/4663 (issue-tracking)
- github.com/open5gs/open5gs/commit/c18dc6938bf63cc7374315d3dca303d92066e746 (patch)
- github.com/open5gs/open5gs/ (product)
Frequently asked questions
- What is CVE-2026-78157?
- CVE-2026-78157 is a high-severity vulnerability in Open5gs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.4/10. Published 2026-08-24.
- How severe is CVE-2026-78157?
- High severity. CVSS v3 base score is 7.4 out of 10.