HLL 反序列化 lenTotal/lenUsed 校验缺失导致堆越界写
Summary
| CVE | CVE-2026-111441 |
|---|---|
| State | PUBLISHED |
| Assigner | openGauss |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-19 03:16:58 UTC |
| Updated | 2026-10-19 20:56:36 UTC |
| 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 。 |
Risk And Classification
Primary CVSS: v3.1 8.1 HIGH from a1a479f7-907b-4ae8-a999-9148cadc9224
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS: 0.004040000 probability, percentile 0.332520000 (date 2026-10-19)
Problem Types: CWE-122 | CWE-122 CWE-122 Heap-based buffer overflow
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | a1a479f7-907b-4ae8-a999-9148cadc9224 | Secondary | 8.1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| 3.1 | CNA | CVSS | 8.1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | OpenGauss-server | OpenGauss-server | unaffected 7.0.0-LTS | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 7.0.0-RC1, 7.0.0-RC2 7.0.0-RC3 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 2.1.0 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 3.0.0-3.0.6 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 3.1.0 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 5.0.0-5.0.5 | openEuler Centos |
| CNA | OpenGauss-server | OpenGauss-server | affected 6.0.0-6.0.6 | openEuler Centos |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| gitcode.com/opengauss/openGauss-server/pull/9380 | a1a479f7-907b-4ae8-a999-9148cadc9224 | gitcode.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.