CVE-2026-14178 (GCVE-0-2026-14178)

Vulnerability from cvelistv5 – Published: 2026-06-30 13:56 – Updated: 2026-06-30 14:40
VLAI?
Title
openGauss存在非法内存访问导致DoS漏洞
Summary
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。
Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
openGauss-server openGauss-server-7.0.0-RC2 Affected: openGauss-server-7.0.0-RC2
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\\u73af\\u5883\\u4e0b\\u8868\\u73b0\\u4e3a\\u6570\\u636e\\u5e93\\u670d\\u52a1\\u9000\\u51fa\\uff1b\\u5728\\u5b9e\\u9645\\u8fd0\\u884c\\u73af\\u5883\\u4e2d\\u53ef\\u80fd\\u9020\\u6210\\u540e\\u7aef\\u8fdb\\u7a0b\\u5f02\\u5e38\\u9000\\u51fa\\uff0c\\u5f71\\u54cd\\u6570\\u636e\\u5e93\\u670d\\u52a1\\u53ef\\u7528\\u6027\\uff0c\\u5f62\\u6210\\u62d2\\u7edd\\u670d\\u52a1\\u98ce\\u9669\\u3002\\u8be5\\u95ee\\u9898\\u5728openGauss-server-7.0.0-RC1\\u7248\\u672c\\u548copenGauss-server-7.0.0-RC2\\u7248\\u672c\\u5b58\\u5728\\uff0c\\u76ee\\u524d\\u5df2\\u5728openGauss-server-7.0.0-RC3\\u7248\\u672c\\u4fee\\u590d\\u3002\\u7531\\u4e8e\\nopenGauss-server-7.0.0-RC1\\u7248\\u672c\\u548copenGauss-server-7.0.0-RC2\\u5747\\u4e3a\\u521b\\u65b0\\u7248\\u672c\\uff0c\\u4e0d\\u4f1a\\u53d1\\u5e03\\u9488\\u5bf9\\u6027\\u8865\\u4e01\\u5305\\uff0c\\u6d89\\u53ca\\u7248\\u672c\\u5347\\u7ea7\\u81f3\\nopenGauss-server-7.0.0-RC3\\u6216\\u66f4\\u65b0\\u7248\\u672c\\u5373\\u53ef\\u3002\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use after free\"}]}], \"providerMetadata\": {\"orgId\": \"a1a479f7-907b-4ae8-a999-9148cadc9224\", \"shortName\": \"openGauss\", \"dateUpdated\": \"2026-06-30T13:56:16.846Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-14178\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-30T14:40:10.603Z\", \"dateReserved\": \"2026-06-30T07:37:54.949Z\", \"assignerOrgId\": \"a1a479f7-907b-4ae8-a999-9148cadc9224\", \"datePublished\": \"2026-06-30T13:56:16.846Z\", \"assignerShortName\": \"openGauss\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.