openGauss存在非法内存访问导致DoS漏洞
Summary
| CVE | CVE-2026-14178 |
|---|---|
| State | PUBLISHED |
| Assigner | openGauss |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-30 14:16:25 UTC |
| Updated | 2026-06-30 15:16:51 UTC |
| Description | openGauss 在处理带 NLS 参数的 to_timestamp 调用时，to_timestamp_with_fmt_nls() 会将 nls_fmt_str 保存到 u_sess->parser_cxt.nls_fmt_str。在 seqscan + sort 执行路径下，该字符串原本被分配在 SeqScan 的表达式上下文中；当 SeqScan 完成后，该内存上下文会被 reset，但后续结果输出阶段 timestamp_out() 仍会通过 CheckNlsFormat() 访问 u_sess->parser_cxt.nls_fmt_str，导致访问已释放内存。攻击者在具备数据库 SQL 执行权限的情况下，可构造特定 to_timestamp(..., ..., nlsparam) 查询触发 heap-use-after-free。在 ASan/Memcheck 环境下表现为数据库服务退出；在实际运行环境中可能造成后端进程异常退出，影响数据库服务可用性，形成拒绝服务风险。该问题在openGauss-server-7.0.0-RC1版本和openGauss-server-7.0.0-RC2版本存在，目前已在openGauss-server-7.0.0-RC3版本修复。由于 openGauss-server-7.0.0-RC1版本和openGauss-server-7.0.0-RC2均为创新版本，不会发布针对性补丁包，涉及版本升级至 openGauss-server-7.0.0-RC3或更新版本即可。 |
Risk And Classification
Primary CVSS: v3.1 5.9 MEDIUM from a1a479f7-907b-4ae8-a999-9148cadc9224
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-416 | CWE-416 CWE-416 Use after free
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | a1a479f7-907b-4ae8-a999-9148cadc9224 | Secondary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | OpenGauss-server | OpenGauss-server-7.0.0-RC2 | affected openGauss-server-7.0.0-RC2 | openEuler, Centos |
| CNA | OpenGauss-server | OpenGauss-server-7.0.0-RC1 | affected openGauss-server-7.0.0-RC1 | openEuler, Centos |
| CNA | OpenGauss-server | OpenGauss-server-7.0.0-RC3 | unaffected openGauss-server-7.0.0-RC3 | openEuler Centos |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| gitcode.com/opengauss/openGauss-server/pull/8877 | a1a479f7-907b-4ae8-a999-9148cadc9224 | gitcode.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.