CVE-2026-111441 Details
Description
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 。
A heap buffer overflow vulnerability has been identified in openGauss Server versions 2.1.0, 3.0.x, 3.1.x, 5.0.x, 5.1.0, 6.0.x, and the release candidates 7.0.0-RC1, 7.0.0-RC2, and 7.0.0-RC3. The issue arises in the HllObjectUnpack() function within the HLL (HyperLogLog) utility file. The vulnerability is caused by inadequate length validation when the function unpacks user-provided packed HLL data. Specifically, the function fails to ensure that the total length is greater than or equal to the used length before allocating a buffer and copying the data. This oversight allows for the creation of malformed packed HLLs that, when processed through certain SQL entry points, can trigger a heap-based buffer overflow, leading to potential memory corruption.
Users can upgrade to openGauss Server version 7.0.0-LTS, where this vulnerability has been fixed by adding the necessary length checks and correcting the buffer size used in the memcpy_s() function.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 19, 2026CISA-ADP
Assessed Oct 19, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gitcode.com/opengauss/openGauss-server/pull/9380 | openGauss Community | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | openGauss Community |
Affected Products
| Product | Versions |
|---|---|
| openGauss-server | 2.1.0 (semver) ~3.0 ~3.1 ~5.0 5.1.0 (semver) ~6.0 7.0.0-RC1 (semver) 7.0.0-RC2 (semver) 7.0.0-RC3 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 19, 2026 | CVE Modified | CISA-ADP |
| Oct 19, 2026 | New CVE Received | openGauss Community |