Uncontrolled resource allocation in Open5GS GTP-U receive path
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-400.
Summary
Open5GS versions 2.7.0 through 2.7.7 are affected. The ogs_pfcp_xact_local_create function in the GTP-U receive path allocates resources without limits or throttling (CWE-770), which has a low availability impact. A remote attacker with no privileges and no user interaction can trigger it. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
A weakness has been identified in Open5GS up to 2.7.7. This vulnerability affects the function ogs_pfcp_xact_local_create of the file src/upf/gtp-path.c of the component GTP-U Receive Path. This manipulation causes allocation of resources. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Patch name: 9ffc252482d9b03ac01abcedbe95497ff4f95dd0. It is recommended to apply a patch to fix this issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Open5GS | 2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; 2.7.6; 2.7.7 | — | No fix listed | CNA |
- Open5GS Vendor— Affected 2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; 2.7.6; 2.7.7 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Open5GS. The source description recommends applying patch commit 9ffc252482d9b03ac01abcedbe95497ff4f95dd0.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-07 Threatist record created from CVE-2026-107166
- 2026-10-07 Alias added: GHSA-qv2w-h32m-r96m
- 2026-10-07 CISA SSVC decision points changed
- 2026-10-07 Priority changed: MEDIUM → HIGH
References
Sources
- CVE-2026-107166 · CVE Program
- CVE-2026-107166 · NVD
- FIRST EPSS
- GHSA-qv2w-h32m-r96m · GitHub Advisory Database · CC BY 4.0
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