CVE-2023-54020 (CNNVD-202512-4680)

UNKNOWN
中文标题:
Linux kernel 安全漏洞
英文标题:
dmaengine: sf-pdma: pdma_desc memory leak fix
CVSS分数: N/A
发布时间: 2025-12-24 10:55:50
漏洞类型: 其他
状态: PUBLISHED
数据质量分数: 0.40
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sf-pdma驱动未正确释放描述符导致内存泄漏，可能造成内存耗尽。

英文描述:

In the Linux kernel, the following vulnerability has been resolved: dmaengine: sf-pdma: pdma_desc memory leak fix Commit b2cc5c465c2c ("dmaengine: sf-pdma: Add multithread support for a DMA channel") changed sf_pdma_prep_dma_memcpy() to unconditionally allocate a new sf_pdma_desc each time it is called. The driver previously recycled descs, by checking the in_use flag, only allocating additional descs if the existing one was in use. This logic was removed in commit b2cc5c465c2c ("dmaengine: sf-pdma: Add multithread support for a DMA channel"), but sf_pdma_free_desc() was not changed to handle the new behaviour. As a result, each time sf_pdma_prep_dma_memcpy() is called, the previous descriptor is leaked, over time leading to memory starvation: unreferenced object 0xffffffe008447300 (size 192): comm "irq/39-mchp_dsc", pid 343, jiffies 4294906910 (age 981.200s) hex dump (first 32 bytes): 00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00 ................ 00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00 ..p............. backtrace: [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28 [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178 [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112 Add the missing kfree() to sf_pdma_free_desc(), and remove the redundant in_use flag.

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 b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11 - - cpe:2.3:a:linux:linux:b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11:*:*:*:*:*:*:*
Linux Linux 4c7350b1dd8a192af844de32fc99b9e34c876fda - - cpe:2.3:a:linux:linux:4c7350b1dd8a192af844de32fc99b9e34c876fda:*:*:*:*:*:*:*
Linux Linux a93b3f1e11971a91b6441b6d47488f4492cc113f - - cpe:2.3:a:linux:linux:a93b3f1e11971a91b6441b6d47488f4492cc113f:*:*:*:*:*:*:*
Linux Linux 6.0 - - cpe:2.3:a:linux:linux:6.0:*:*:*:*:*:*:*
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
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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:
2025-12-24 10:55:50
修改时间:
2025-12-24 10:55:50
创建时间:
2026-01-12 02:09:09
更新时间:
2026-01-20 03:10:43
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-2023-54020 2025-12-25 02:03:31 2026-01-12 02:09:09
NVD nvd_CVE-2023-54020 2025-12-30 04:12:18 2026-01-12 02:27:00
CNNVD cnnvd_CNNVD-202512-4680 2026-01-11 06:15:04 2026-01-12 02:38:06
版本与语言
当前版本: v3
主要语言: EN
支持语言:
ZH EN
安全公告
暂无安全公告信息
变更历史
v3 CNNVD
2026-01-12 02:38:06
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-202512-4680; 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-202512-4680
  • data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
v2 NVD
2026-01-12 02:27:00
data_sources: ['cve'] → ['cve', 'nvd']
查看详细变更
  • data_sources: ['cve'] -> ['cve', 'nvd']