CVE-2024-43892— 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，该漏洞源于在访问mem_cgroup_idr时未保护并发访问，导致潜在的竞争条件。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 73f576c04b9410ed19660f74f97521bee6e1c546< 912736a0435ef40e6a4ae78197ccb5553cb80b05 |
affected |
73f576c04b9410ed19660f74f97521bee6e1c546< e6cc9ff2ac0b5df9f25eb790934c3104f6710278 |
affected | ||
73f576c04b9410ed19660f74f97521bee6e1c546< 56fd70f4aa8b82199dbe7e99366b1fd7a04d86fb |
affected | ||
73f576c04b9410ed19660f74f97521bee6e1c546< 37a060b64ae83b76600d187d76591ce488ab836b |
affected | ||
73f576c04b9410ed19660f74f97521bee6e1c546< 51c0b1bb7541f8893ec1accba59eb04361a70946 |
affected | ||
73f576c04b9410ed19660f74f97521bee6e1c546< 9972605a238339b85bd16b084eed5f18414d22db |
affected | ||
8627c7750a66a46d56d3564e1e881aa53764497c |
affected | ||
db70cd18d3da727a3a59694de428a9e41c620de7 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2024-43892 基础信息
漏洞信息
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Vulnerability Title
memcg: protect concurrent access to mem_cgroup_idr
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
memcg: protect concurrent access to mem_cgroup_idr
Commit 73f576c04b94 ("mm: memcontrol: fix cgroup creation failure after
many small jobs") decoupled the memcg IDs from the CSS ID space to fix the
cgroup creation failures. It introduced IDR to maintain the memcg ID
space. The IDR depends on external synchronization mechanisms for
modifications. For the mem_cgroup_idr, the idr_alloc() and idr_replace()
happen within css callback and thus are protected through cgroup_mutex
from concurrent modifications. However idr_remove() for mem_cgroup_idr
was not protected against concurrency and can be run concurrently for
different memcgs when they hit their refcnt to zero. Fix that.
We have been seeing list_lru based kernel crashes at a low frequency in
our fleet for a long time. These crashes were in different part of
list_lru code including list_lru_add(), list_lru_del() and reparenting
code. Upon further inspection, it looked like for a given object (dentry
and inode), the super_block's list_lru didn't have list_lru_one for the
memcg of that object. The initial suspicions were either the object is
not allocated through kmem_cache_alloc_lru() or somehow
memcg_list_lru_alloc() failed to allocate list_lru_one() for a memcg but
returned success. No evidence were found for these cases.
Looking more deeply, we started seeing situations where valid memcg's id
is not present in mem_cgroup_idr and in some cases multiple valid memcgs
have same id and mem_cgroup_idr is pointing to one of them. So, the most
reasonable explanation is that these situations can happen due to race
between multiple idr_remove() calls or race between
idr_alloc()/idr_replace() and idr_remove(). These races are causing
multiple memcgs to acquire the same ID and then offlining of one of them
would cleanup list_lrus on the system for all of them. Later access from
other memcgs to the list_lru cause crashes due to missing list_lru_one.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于在访问mem_cgroup_idr时未保护并发访问，导致潜在的竞争条件。
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-2024-43892 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2024-43892 补丁与修复 (3)
CVE-2024-43892 其他参考 (3)
同批安全公告 · Linux · 2024-08-26 · 共 39 条
| CVE-2024-43897 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43910 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44934 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43891 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44939 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43888 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44941 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44942 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44940 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44933 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-43913 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-44938 | Linux kernel 安全漏洞 | |
| CVE-2024-44937 | Linux kernel 安全漏洞 | |
| CVE-2024-44936 | Linux kernel 安全漏洞 | |
| CVE-2024-43908 | Linux kernel 安全漏洞 | |
| CVE-2024-44935 | Linux kernel 安全漏洞 | |
| CVE-2024-44932 | Linux kernel 安全漏洞 | |
| CVE-2024-44931 | Linux kernel 安全漏洞 | |
| CVE-2024-43914 | Linux kernel 安全漏洞 | |
| CVE-2024-43912 | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2024-43892
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