CVE-2025-40348 (CNNVD-202512-2996)
中文标题:
Linux kernel 安全漏洞
英文标题:
slab: Avoid race on slab->obj_exts in alloc_slab_obj_exts
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alloc_slab_obj_exts中存在竞争条件，可能导致空指针取消引用。
英文描述:
In the Linux kernel, the following vulnerability has been resolved: slab: Avoid race on slab->obj_exts in alloc_slab_obj_exts If two competing threads enter alloc_slab_obj_exts() and one of them fails to allocate the object extension vector, it might override the valid slab->obj_exts allocated by the other thread with OBJEXTS_ALLOC_FAIL. This will cause the thread that lost this race and expects a valid pointer to dereference a NULL pointer later on. Update slab->obj_exts atomically using cmpxchg() to avoid slab->obj_exts overrides by racing threads. Thanks for Vlastimil and Suren's help with debugging.
CWE类型:
标签:
受影响产品
| 厂商 | 产品 | 版本 | 版本范围 | 平台 | CPE |
|---|---|---|---|---|---|
| Linux | Linux | - | < c7af5300d78460fc5037ddc77113ba3dbfe77dc0 | - |
cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*
|
解决方案
中文解决方案:
英文解决方案:
临时解决方案:
CVSS评分详情
时间信息
利用信息
数据源详情
| 数据源 | 记录ID | 版本 | 提取时间 |
|---|---|---|---|
| CVE | cve_CVE-2025-40348 |
2025-12-19 03:24:49 | 2026-01-12 02:11:48 |
| NVD | nvd_CVE-2025-40348 |
2025-12-19 03:25:38 | 2026-01-12 02:27:47 |
| CNNVD | cnnvd_CNNVD-202512-2996 |
2026-01-11 06:15:04 | 2026-01-12 02:38:01 |
版本与语言
安全公告
变更历史
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-202512-2996
- data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
查看详细变更
- affected_products_count: 5 -> 1
- data_sources: ['cve'] -> ['cve', 'nvd']