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CVE-2026-111441

high

在 openGauss-server 的 src/gausskernel/cbb/utils/hll/hll.cpp 中,内置函数 HllObjectUnpack() 存在长度校验缺陷。该函数从用户提供的 packed HLL 解析 lenUsed 与 lenTotal 后,仅检查输入长度足以覆盖 HLL_HEAD_…

在 openGauss-server 的 src/gausskernel/cbb/utils/hll/hll.cpp 中,内置函数 HllObjectUnpack() 存在长度校验缺陷。该函数从用户提供的 packed HLL 解析 lenUsed 与 lenTotal 后,仅检查输入长度足以覆盖 HLL_HEAD_SIZE + lenUsed,随后按 lenTotal 分配缓冲区、按 lenUsed 调用 memcpy_s() 拷贝输入,既未校验 lenTotal >= lenUsed,也将 memcpy_s() 目标大小写成 lenUsed 而非实际分配的 lenTotal,导致安全拷贝无法拦截越界写。hll_in()、hll_print()、hll_cardinality() 等 SQL 入口会走同一解包路径。因此,普通数据库连接用户只需构造 lenTotal 小于 lenUsed 的畸形 packed HLL(例如经 ::hll 进入 hll_in()),即可触发服务端堆越界写,存在内存破坏风险。此问题随 packed HLL 解包函数 HllObjectUnpack() 进入代码,v2.1.0 起即存在。受影响版本包括 2.1.0、3.0.x、3.1.x、5.0.x、5.1.0、6.0.x,以及 7.0.0-RC1、7.0.0-RC2、7.0.0-RC3。该问题已在 7.0.0-LTS 版本修复,通过在 HllObjectUnpack() 中补齐 lenUsed <= lenTotal 校验,并将 memcpy_s() 的目标大小改为实际分配的 lenTotal。修复 PR 见 https://gitcode.com/opengauss/openGauss-server/pull/9380 。

CVSS
8.1
8.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Severity source: NVD CVSS v3.1 (a1a479f7-907b-4ae8-a999-9148cadc9224)
Timeline (UTC)
Published: 2026-10-19 03:16
Modified: 2026-10-19 20:56
NVD status: Deferred
Last synced 1 day ago
Verified against the source API 2026-10-27 07:03 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 07:03 UTC · record ↗

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