CVE-2024-57952— 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。攻击者利用该漏洞可以导致现有条目在readdir输出中消失。
可能的 ATT&CK 技术 1 AI
T1074 · Data Staged影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a< 9e9e710f68bac49bd9b587823c077d06363440e0 |
affected |
64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a< 3f250b82040a72b0059ae00855a74d8570ad2147 |
affected | ||
64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a< b662d858131da9a8a14e68661656989b14dbf113 |
affected | ||
308b4fc2403b335894592ee9dc212a5e58bb309f |
affected | ||
6.10.7< 6.11 |
affected | ||
6.11 |
affected | ||
< 6.11 |
unaffected | ||
6.12.12≤ 6.12.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2024-57952 基础信息
漏洞信息
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Vulnerability Title
Revert "libfs: fix infinite directory reads for offset dir"
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
Revert "libfs: fix infinite directory reads for offset dir"
The current directory offset allocator (based on mtree_alloc_cyclic)
stores the next offset value to return in octx->next_offset. This
mechanism typically returns values that increase monotonically over
time. Eventually, though, the newly allocated offset value wraps
back to a low number (say, 2) which is smaller than other already-
allocated offset values.
Yu Kuai <yukuai3@huawei.com> reports that, after commit 64a7ce76fb90
("libfs: fix infinite directory reads for offset dir"), if a
directory's offset allocator wraps, existing entries are no longer
visible via readdir/getdents because offset_readdir() stops listing
entries once an entry's offset is larger than octx->next_offset.
These entries vanish persistently -- they can be looked up, but will
never again appear in readdir(3) output.
The reason for this is that the commit treats directory offsets as
monotonically increasing integer values rather than opaque cookies,
and introduces this comparison:
if (dentry2offset(dentry) >= last_index) {
On 64-bit platforms, the directory offset value upper bound is
2^63 - 1. Directory offsets will monotonically increase for millions
of years without wrapping.
On 32-bit platforms, however, LONG_MAX is 2^31 - 1. The allocator
can wrap after only a few weeks (at worst).
Revert commit 64a7ce76fb90 ("libfs: fix infinite directory reads for
offset dir") to prepare for a fix that can work properly on 32-bit
systems and might apply to recent LTS kernels where shmem employs
the simple_offset mechanism.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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。攻击者利用该漏洞可以导致现有条目在readdir输出中消失。
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-2024-57952 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-57952 补丁与修复 (3)
同批安全公告 · Linux · 2025-02-12 · 共 7 条
| CVE-2025-21697 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21699 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57951 | Linux kernel 安全漏洞 | |
| CVE-2025-21694 | Linux kernel 安全漏洞 | |
| CVE-2025-21695 | Linux kernel 安全漏洞 | |
| CVE-2025-21696 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2024-57952
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