HLL 反序列化 lenTotal/lenUsed 校验缺失导致堆越界写
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 。
CVE-2026-111441
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-111441
openGauss-server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
openGauss-server
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "openGauss-server",
"product": "openGauss-server",
"versions": [
{
"status": "unaffected",
"version": "7.0.0-LTS"
}
],
"platforms": [
"openEuler Centos"
],
"collectionURL": "https://opengauss.org/zh/download/archive/?version=7.0.0%20(LTS)",
"defaultStatus": "unaffected"
},
{
"vendor": "openGauss-server",
"product": "openGauss-server",
"versions": [
{
"status": "affected",
"version": "7.0.0-RC1, 7.0.0-RC2 7.0.0-RC3"
},
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "3.0.0-3.0.6"
},
{
"status": "affected",
"version": "3.1.0"
},
{
"status": "affected",
"version": "5.0.0-5.0.5"
},
{
"status": "affected",
"version": "6.0.0-6.0.6"
}
],
"platforms": [
"openEuler Centos"
],
"collectionURL": "https://opengauss.org/zh/download/archive/?version=7.0.0-RC3",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-111441
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39083 · Revision 1
- Added to Heist Feed
- Publisher date