High · CVSS 8.1CVE-2026-111441

HLL 反序列化 lenTotal/lenUsed 校验缺失导致堆越界写CVE-2026-111441

Answer in brief

CVE-2026-111441 records a High severity (CVSS 8.1) vulnerability in HLL 反序列化 lenTotal/lenUsed 校验缺失导致堆越界写. The current sources do not mark it as known exploited. The current feed maps openGauss-server/openGauss-server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 19, 2026Updated Oct 19, 2026Source checked Oct 19, 2026First seen by HOL Oct 19, 2026Material review Oct 19, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openGauss-server/openGauss-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openGauss-server/openGauss-servergeneric	7.0.0-RC1 7.0.0-RC2 7.0.0-RC3 \|\| 2.1.0 \|\| 3.0.0-3.0.6 \|\| 3.1.0 \|\| 5.0.0-5.0.5 \|\| 6.0.0-6.0.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for openGauss-server/openGauss-server.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 19, 2026

Sources and claim methodology

Source referencegitcode.com

Upstream source 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 。

Quoted source text, attributed separately from HOL analysis.

Affected scope and exposure questions

The current feed maps openGauss-server/openGauss-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openGauss-server/openGauss-servergeneric	7.0.0-RC1 7.0.0-RC2 7.0.0-RC3 \|\| 2.1.0 \|\| 3.0.0-3.0.6 \|\| 3.1.0 \|\| 5.0.0-5.0.5 \|\| 6.0.0-6.0.6	Not reported

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.