CVE-2026-2521 Details
Description
A weakness has been identified in Open5GS up to 2.7.6. This issue affects the function sgwc_s5c_handle_create_session_response of the component SGW-C. Executing a manipulation can lead to memory corruption. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
A memory corruption vulnerability has been identified in Open5GS versions through 2.7.6, specifically within the SGW-C component's session management. The issue arises when a Create Session Response is received on the S5-C interface, containing a PDN Address Allocation (PAA) Information Element (IE) with a length that exceeds the expected size. This discrepancy allows for a buffer overflow, as the software fails to properly validate the length before processing the PAA data. The vulnerability can be exploited remotely, leading to a crash of the SGW-C process.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/open5gs/open5gs/ | [email protected] | Product |
| https://github.com/open5gs/open5gs/issues/4282 | [email protected] | ExploitIssue TrackingVendor Advisory |
| https://github.com/open5gs/open5gs/issues/4282#issue-3807902188 | [email protected] | ExploitIssue TrackingVendor Advisory |
| https://vuldb.com/?ctiid.346109 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.346109 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.738334 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| open5gs open5gs | <= 2.7.6 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 15, 2026 | New CVE Received | [email protected] |