CVE-2026-64192— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.10版本存在安全漏洞，该漏洞源于BPF LSM未初始化时未拒绝BPF_MAP_TYPE_INODE_STORAGE创建，可能导致特权用户通过操作inode存储映射触发内核崩溃。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< 413b14b9623a2e6ee131c2b2152b304aeb04e378 |
affected |
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< a6d634f794c808a261eac7d5af023a7e06b9ecd8 |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< 721f669853bdbf46b475a81bb5d05d610f8c19de |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< 5337eebdf8c5d4810b1913047f078d2815d5645f |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< de984ea883405420fdc416ae8964b752df586970 |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< 267fdd9b6530c399dfd996e1a0a7628b45baf9f0 |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< c76b8abce575e0c6e4096957220b4515ed847d89 |
affected | ||
8ea636848aca35b9f97c5b5dee30225cf2dd0fe6< a6f0643e4f63cfaa0d5d4a69de4f132eac4b8fe4 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-64192 基础信息
漏洞信息
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Vulnerability Title
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM is uninitialized
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM is uninitialized
When CONFIG_BPF_LSM=y is set, BPF inode storage maps
(BPF_MAP_TYPE_INODE_STORAGE) are compiled into the kernel. However,
if the BPF LSM is not explicitly enabled at boot time (e.g. omitted
from the "lsm=" boot parameter), lsm_prepare() is never executed for
the BPF LSM.
Consequently, the BPF inode security blob offset
(bpf_lsm_blob_sizes.lbs_inode) is never initialized and remains at
its default compiled size of 8 bytes instead of being updated to a
valid offset past the reserved struct rcu_head (typically 16 bytes
or more).
When a privileged user creates and updates a BPF_MAP_TYPE_INODE_STORAGE
map, bpf_inode() evaluates inode->i_security + 8. This erroneously
aliases the struct rcu_head.func callback pointer at the beginning
of the inode->i_security blob. During subsequent map element cleanup
or inode destruction, writing NULL to owner_storage clears the queued
RCU callback pointer. When rcu_do_batch() later executes the queued
callback, it attempts an instruction fetch at address 0x0, triggering
an immediate kernel panic.
Fix this by introducing a global bpf_lsm_initialized boolean flag
marked with __ro_after_init. Set this flag to true inside bpf_lsm_init()
when the LSM framework successfully registers the BPF LSM. Gate map
allocation in inode_storage_map_alloc() on this flag, returning
-EOPNOTSUPP if the BPF LSM is in turn uninitialized.
This fail-fast approach prevents userspace from allocating inode
storage maps when the supporting BPF LSM infrastructure is absent,
avoiding zombie map states.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.10版本存在安全漏洞，该漏洞源于BPF LSM未初始化时未拒绝BPF_MAP_TYPE_INODE_STORAGE创建，可能导致特权用户通过操作inode存储映射触发内核崩溃。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-64192 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64192 补丁与修复 (7)
同批安全公告 · Linux · 2026-07-20 · 共 9 条
| CVE-2026-64206 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64188 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64189 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64191 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64187 | Linux kernel 安全漏洞 | |
| CVE-2026-64190 | Linux kernel 安全漏洞 | |
| CVE-2026-64205 | Linux kernel 安全漏洞 | |
| CVE-2026-64207 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-64192
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