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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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 14:39 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
openGauss-server openGauss-server-7.0.0-RC2 Affected: openGauss-server-7.0.0-RC2
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openGauss-server openGauss-server-7.0.0-RC1 Affected: openGauss-server-7.0.0-RC1
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openGauss-server openGauss-server-7.0.0-RC3 Unaffected: openGauss-server-7.0.0-RC3
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Date Public
2026-06-30 07:53
Show details on NVD website
To clipboard 

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              "collectionURL": "https://opengauss.org/zh/download/archive/?version=7.0.0-RC2",
              "defaultStatus": "affected",
              "platforms": [
                "openEuler",
                "Centos"
              ],
              "product": "openGauss-server-7.0.0-RC2",
              "vendor": "openGauss-server",
              "versions": [
                {
                  "status": "affected",
                  "version": "openGauss-server-7.0.0-RC2"
                }
              ]
            },
            {
              "collectionURL": "https://opengauss.org/zh/download/archive/?version=7.0.0-RC1",
              "defaultStatus": "affected",
              "platforms": [
                "openEuler",
                "Centos"
              ],
              "product": "openGauss-server-7.0.0-RC1",
              "vendor": "openGauss-server",
              "versions": [
                {
                  "status": "affected",
                  "version": "openGauss-server-7.0.0-RC1"
                }
              ]
            },
            {
              "collectionURL": "https://opengauss.org/zh/download/archive/?version=7.0.0-RC3",
              "defaultStatus": "unaffected",
              "platforms": [
                "openEuler Centos"
              ],
              "product": "openGauss-server-7.0.0-RC3",
              "vendor": "openGauss-server",
              "versions": [
                {
                  "status": "unaffected",
                  "version": "openGauss-server-7.0.0-RC3"
                }
              ]
            }
          ],
          "datePublic": "2026-06-30T07:53:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
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              "value": "openGauss \u5728\u5904\u7406\u5e26 NLS \u53c2\u6570\u7684 to_timestamp \u8c03\u7528\u65f6\uff0cto_timestamp_with_fmt_nls() \u4f1a\u5c06 nls_fmt_str \u4fdd\u5b58\u5230 u_sess-\u003eparser_cxt.nls_fmt_str\u3002\u5728 seqscan + sort \u6267\u884c\u8def\u5f84\u4e0b\uff0c\u8be5\u5b57\u7b26\u4e32\u539f\u672c\u88ab\u5206\u914d\u5728 SeqScan \u7684\u8868\u8fbe\u5f0f\u4e0a\u4e0b\u6587\u4e2d\uff1b\u5f53 SeqScan \u5b8c\u6210\u540e\uff0c\u8be5\u5185\u5b58\u4e0a\u4e0b\u6587\u4f1a\u88ab reset\uff0c\u4f46\u540e\u7eed\u7ed3\u679c\u8f93\u51fa\u9636\u6bb5 timestamp_out() \u4ecd\u4f1a\u901a\u8fc7 CheckNlsFormat() \u8bbf\u95ee u_sess-\u003eparser_cxt.nls_fmt_str\uff0c\u5bfc\u81f4\u8bbf\u95ee\u5df2\u91ca\u653e\u5185\u5b58\u3002\u653b\u51fb\u8005\u5728\u5177\u5907\u6570\u636e\u5e93 SQL \u6267\u884c\u6743\u9650\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u6784\u9020\u7279\u5b9a to_timestamp(..., ..., nlsparam) \u67e5\u8be2\u89e6\u53d1 heap-use-after-free\u3002\u5728 ASan/Memcheck \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"
            }
          ],
          "impacts": [
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              "descriptions": [
                {
                  "lang": "en",
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              ]
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-416",
                  "description": "CWE-416 Use after free",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-30T13:56:16.846Z",
            "orgId": "a1a479f7-907b-4ae8-a999-9148cadc9224",
            "shortName": "openGauss"
          },
          "references": [
            {
              "url": "https://gitcode.com/opengauss/openGauss-server/pull/8877"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "openGauss\u5b58\u5728\u975e\u6cd5\u5185\u5b58\u8bbf\u95ee\u5bfc\u81f4DoS\u6f0f\u6d1e",
          "x_generator": {
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          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a1a479f7-907b-4ae8-a999-9148cadc9224",
        "assignerShortName": "openGauss",
        "cveId": "CVE-2026-14178",
        "datePublished": "2026-06-30T13:56:16.846Z",
        "dateReserved": "2026-06-30T07:37:54.949Z",
        "dateUpdated": "2026-06-30T14:40:10.603Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.