CVE-2026-108103

Open5GS through 2.8.0 contains a heap out-of-bounds read vulnerability in ogs_pfcp_parse_dropped_dl_traffic_threshold() that allows remote unauthenticated attackers to read past IE buffers via short IEs. Attackers can send PFCP Session Establishment or Modification Requests to the UPF on UDP port 8805 with DLPA and DLBY flags set, potentially crashing the UPF.

CVSS 4.0

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-10-09

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

References

• https://github.com/open5gs/open5gs
• https://github.com/open5gs/open5gs/blob/v2.8.0/lib/pfcp/types.c#L484-L516
• https://github.com/open5gs/open5gs/commit/88e64fc1f87e0d321364b3bb710ef6a8f274e568
• https://www.vulncheck.com/advisories/open5gs-through-2.8.0-heap-out-of-bounds-read-via-pfcp-dropped-dl-traffic-threshold-ie

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