CVE-2025-40169 (CNNVD-202511-1436)
中文标题:
Linux kernel 安全漏洞
英文标题:
bpf: Reject negative offsets for ALU ops
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BPF验证器未正确拒绝ALU操作中的负偏移量，可能导致恶意BPF程序执行。
英文描述:
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject negative offsets for ALU ops When verifying BPF programs, the check_alu_op() function validates instructions with ALU operations. The 'offset' field in these instructions is a signed 16-bit integer. The existing check 'insn->off > 1' was intended to ensure the offset is either 0, or 1 for BPF_MOD/BPF_DIV. However, because 'insn->off' is signed, this check incorrectly accepts all negative values (e.g., -1). This commit tightens the validation by changing the condition to '(insn->off != 0 && insn->off != 1)'. This ensures that any value other than the explicitly permitted 0 and 1 is rejected, hardening the verifier against malformed BPF programs.
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 | - | < 3bce44b344040e5eef3d64d38b157c15304c0aab | - |
cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*
|
| Linux | Linux | 6.6 | - | - |
cpe:2.3:a:linux:linux:6.6:*:*:*:*:*:*:*
|
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-2025-40169 |
2025-12-03 03:24:31 | 2026-01-12 02:11:44 |
| NVD | nvd_CVE-2025-40169 |
2025-11-14 03:00:08 | 2026-01-12 02:27:46 |
| CNNVD | cnnvd_CNNVD-202511-1436 |
2026-01-15 01:52:30 | 2026-01-15 01:52:58 |
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-202511-1436
- data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
查看详细变更
- affected_products_count: 5 -> 2
- data_sources: ['cve'] -> ['cve', 'nvd']