CVE-2022-50446 (CNNVD-202510-172)

UNKNOWN
中文标题:
Linux kernel 安全漏洞
英文标题:
ARC: mm: fix leakage of memory allocated for PTE
CVSS分数: N/A
发布时间: 2025-10-01 11:45:20
漏洞类型: 其他
状态: PUBLISHED
数据质量分数: 0.30
数据版本: v3
漏洞描述
中文描述:

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于pmd_pgtable宏未适配页表结构更改，可能导致内存泄漏。

英文描述:

In the Linux kernel, the following vulnerability has been resolved: ARC: mm: fix leakage of memory allocated for PTE Since commit d9820ff ("ARC: mm: switch pgtable_t back to struct page *") a memory leakage problem occurs. Memory allocated for page table entries not released during process termination. This issue can be reproduced by a small program that allocates a large amount of memory. After several runs, you'll see that the amount of free memory has reduced and will continue to reduce after each run. All ARC CPUs are effected by this issue. The issue was introduced since the kernel stable release v5.15-rc1. As described in commit d9820ff after switch pgtable_t back to struct page *, a pointer to "struct page" and appropriate functions are used to allocate and free a memory page for PTEs, but the pmd_pgtable macro hasn't changed and returns the direct virtual address from the PMD (PGD) entry. Than this address used as a parameter in the __pte_free() and as a result this function couldn't release memory page allocated for PTEs. Fix this issue by changing the pmd_pgtable macro and returning pointer to struct page.

CWE类型:
（暂无数据）
标签:
（暂无数据）
受影响产品
厂商 产品 版本 版本范围 平台 CPE
Linux Linux - < 14009ada5712649589ab4ad0441b811780ea8773 - cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*
Linux Linux 5.15 - - cpe:2.3:a:linux:linux:5.15:*:*:*:*:*:*:*
解决方案
中文解决方案:
（暂无数据）
英文解决方案:
（暂无数据）
临时解决方案:
（暂无数据）
参考链接
无标题 OTHER
cve.org
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cve.org
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cve.org
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CVSS评分详情
暂无CVSS评分信息
时间信息
发布时间:
2025-10-01 11:45:20
修改时间:
2025-10-01 11:45:20
创建时间:
2025-11-11 15:37:58
更新时间:
2025-11-11 16:00:16
利用信息
暂无可利用代码信息
数据源详情
数据源 记录ID 版本 提取时间
CVE cve_CVE-2022-50446 2025-11-11 15:21:45 2025-11-11 07:37:58
NVD nvd_CVE-2022-50446 2025-11-11 14:58:37 2025-11-11 07:46:08
CNNVD cnnvd_CNNVD-202510-172 2025-11-11 15:12:30 2025-11-11 08:00:16
版本与语言
当前版本: v3
主要语言: EN
支持语言:
EN ZH
安全公告
暂无安全公告信息
变更历史
v3 CNNVD
2025-11-11 16:00:16
vulnerability_type: 未提取 → 其他; severity: SeverityLevel.MEDIUM → SeverityLevel.UNKNOWN; cvss_score: 未提取 → 0.0; cnnvd_id: 未提取 → CNNVD-202510-172; data_sources: ['cve', 'nvd'] → ['cnnvd', 'cve', 'nvd']
查看详细变更
  • vulnerability_type: 未提取 -> 其他
  • severity: SeverityLevel.MEDIUM -> SeverityLevel.UNKNOWN
  • cvss_score: 未提取 -> 0.0
  • cnnvd_id: 未提取 -> CNNVD-202510-172
  • data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
v2 NVD
2025-11-11 15:46:08
affected_products_count: 4 → 2; data_sources: ['cve'] → ['cve', 'nvd']
查看详细变更
  • affected_products_count: 4 -> 2
  • data_sources: ['cve'] -> ['cve', 'nvd']