Read the docs
TI-2026-12011 Aliases CVE-2026-14178GHSA-v555-5g3c-vq2x

openGauss存在非法内存访问导致DoS漏洞

Priority LOW 27CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

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。

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix Fixed openGauss-server-7.0.0-RC3 (openGauss-server): openGauss-server-7.0.0-RC3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
openGauss-serveropenGauss-server-7.0.0-RC2openGauss-server-7.0.0-RC2 and later—No fix listedCNA
openGauss-serveropenGauss-server-7.0.0-RC1openGauss-server-7.0.0-RC1 and later—No fix listedCNA
openGauss-serveropenGauss-server-7.0.0-RC3—openGauss-server-7.0.0-RC3Patch availableCNA
  • openGauss-server-7.0.0-RC2 VendoropenGauss-server Affected openGauss-server-7.0.0-RC2 and later Fixed in — No fix listed CNA
  • openGauss-server-7.0.0-RC1 VendoropenGauss-server Affected openGauss-server-7.0.0-RC1 and later Fixed in — No fix listed CNA
  • openGauss-server-7.0.0-RC3 VendoropenGauss-server Affected — Fixed in openGauss-server-7.0.0-RC3 Patch available CNA

Remediation

  • Fix · CNA openGauss-server-7.0.0-RC3 (openGauss-server) Fixed in openGauss-server-7.0.0-RC3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-14178
  2. 2026-10-03 Alias added: GHSA-v555-5g3c-vq2x

References

Other 1

  • TI-2026-76229 Heap overflow in openGauss HLL unpacking from missing length check CVSS 3.1HIGH 8.1
  • TI-2026-76236 Unsafe reflection in openGauss JDBC LogFactory enables class loading CVSS 3.1HIGH 7.0
  • TI-2026-76280 Authentication bypass in openGauss-server replication connections CVSS 3.1MEDIUM 6.5
  • TI-2026-76281 Missing permission check in openGauss lets users read table file blocks CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences