CVE-2023-53440— 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nilfs2 sysfs接口生命周期管理不当，可能导致空指针取消引用和释放后重用。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | dd70edbde2627f47df118d899de6bbb55abcfdbf< d20dcec8f326deb77b6688f8441e014045dac457 |
affected |
dd70edbde2627f47df118d899de6bbb55abcfdbf< 5fe0ea141fbb887d407f1bf572ebf24427480d5c |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< 83b16a60e413148685739635901937e2f16a7873 |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< 3dbee84bf9e3273c4bb9ca6fc18ff22fba23dd24 |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< d540aea451ab5489777a8156560f1388449b3109 |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< 1942ccb7d95f287a312fcbabfa8bc9ba501b1953 |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< daf4eb3a908b108279b60172d2f176e70d2df875 |
affected | ||
dd70edbde2627f47df118d899de6bbb55abcfdbf< 42560f9c92cc43dce75dbf06cc0d840dced39b12 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2023-53440 基础信息
漏洞信息
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Vulnerability Title
nilfs2: fix sysfs interface lifetime
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix sysfs interface lifetime
The current nilfs2 sysfs support has issues with the timing of creation
and deletion of sysfs entries, potentially leading to null pointer
dereferences, use-after-free, and lockdep warnings.
Some of the sysfs attributes for nilfs2 per-filesystem instance refer to
metadata file "cpfile", "sufile", or "dat", but
nilfs_sysfs_create_device_group that creates those attributes is executed
before the inodes for these metadata files are loaded, and
nilfs_sysfs_delete_device_group which deletes these sysfs entries is
called after releasing their metadata file inodes.
Therefore, access to some of these sysfs attributes may occur outside of
the lifetime of these metadata files, resulting in inode NULL pointer
dereferences or use-after-free.
In addition, the call to nilfs_sysfs_create_device_group() is made during
the locking period of the semaphore "ns_sem" of nilfs object, so the
shrinker call caused by the memory allocation for the sysfs entries, may
derive lock dependencies "ns_sem" -> (shrinker) -> "locks acquired in
nilfs_evict_inode()".
Since nilfs2 may acquire "ns_sem" deep in the call stack holding other
locks via its error handler __nilfs_error(), this causes lockdep to report
circular locking. This is a false positive and no circular locking
actually occurs as no inodes exist yet when
nilfs_sysfs_create_device_group() is called. Fortunately, the lockdep
warnings can be resolved by simply moving the call to
nilfs_sysfs_create_device_group() out of "ns_sem".
This fixes these sysfs issues by revising where the device's sysfs
interface is created/deleted and keeping its lifetime within the lifetime
of the metadata files above.
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nilfs2 sysfs接口生命周期管理不当，可能导致空指针取消引用和释放后重用。
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-2023-53440 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-09-18 · 共 121 条
| CVE-2022-50401 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-53382 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-50410 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-50419 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53431 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53432 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50386 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50413 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53374 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53372 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53429 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50399 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53373 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53376 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53386 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50417 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53394 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53387 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53388 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53378 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 121 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2023-53440
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