CVE-2026-1976— Free5GC SMF SessionDeletionResponse null pointer dereference
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I. Basic Information for CVE-2026-1976
Vulnerability Information
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Vulnerability Title
Free5GC SMF SessionDeletionResponse null pointer dereference
Source: NVD (National Vulnerability Database)
Vulnerability Description
A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
free5GC 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 Free5GC 4.1.0及之前版本存在代码问题漏洞，该漏洞源于SMF组件中SessionDeletionResponse函数存在缺陷，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | Free5GC | 4.0 | cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-1976
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|---|
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Same Patch Batch · n/a · 2026-02-06 · 10 CVEs total
| CVE-2026-2062 | 5.3 MEDIUM | Open5GS PGW S5U Address sgwc_sxa_handle_session_modification_response null pointer derefer |
| CVE-2026-1979 | 5.3 MEDIUM | mruby JMPNOT-to-JMPIF Optimization vm.c mrb_vm_exec use after free |
| CVE-2026-1975 | 5.3 MEDIUM | Free5GC pfcp_reports.go identityTriggerType null pointer dereference |
| CVE-2026-1974 | 5.3 MEDIUM | Free5GC SMF datapath.go ResolveNodeIdToIp denial of service |
| CVE-2026-1973 | 5.3 MEDIUM | Free5GC SMF establishPfcpSession null pointer dereference |
| CVE-2026-1998 | 3.3 LOW | micropython runtime.c mp_import_all memory corruption |
| CVE-2026-1991 | 3.3 LOW | libuvc UVC Descriptor device.c uvc_scan_streaming null pointer dereference |
| CVE-2026-1990 | 3.3 LOW | oatpp Type.hpp ObjectWrapper null pointer dereference |
| CVE-2025-70963 | GoPhish 安全漏洞 |
IV. Related Vulnerabilities
Same product: Free5GC
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free5gc UDR fail-open request handling in PolicyDataSubsToNo - CVE-2026-40248
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40247
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40246
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40245
Free5GC: UDR nudr-dr influenceData/subs-to-notify leaks SUPI
Same vendor: n/a
- CVE-2026-8276
bettercap MySQL Server mysql_server.go integer coercion - CVE-2026-8275
bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-476
- CVE-2026-8252
Open5GS SMF smf_nsmf_handle_create_data_in_hsmf null pointer - CVE-2026-7259
Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2026-1976
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