CVE-2025-38687— 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，该漏洞源于轮询和分离操作竞争条件，可能导致释放后重用。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< fe67122ba781df44a1a9716eb1dfd751321ab512 |
affected |
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< cd4286123d6948ff638ea9cd5818ae4796d5d252 |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< d85fac8729c9acfd72368faff1d576ec585e5c8f |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< 0f989f9d05492028afd2bded4b42023c57d8a76e |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< 5c4a2ffcbd052c69bbf4680677d4c4eaa5a252d4 |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< 017198079551a2a5cf61eae966af3c4b145e1f3b |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< 71ca60d2e631cf9c63bcbc7017961c61ff04e419 |
affected | ||
2f3fdcd7ce935f6f2899ceab57dc8fe5286db3e1< 5724e82df4f9a4be62908362c97d522d25de75dd |
affected | ||
| … +12 条更多 | |||
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一、 漏洞 CVE-2025-38687 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
comedi: fix race between polling and detaching
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
comedi: fix race between polling and detaching
syzbot reports a use-after-free in comedi in the below link, which is
due to comedi gladly removing the allocated async area even though poll
requests are still active on the wait_queue_head inside of it. This can
cause a use-after-free when the poll entries are later triggered or
removed, as the memory for the wait_queue_head has been freed. We need
to check there are no tasks queued on any of the subdevices' wait queues
before allowing the device to be detached by the `COMEDI_DEVCONFIG`
ioctl.
Tasks will read-lock `dev->attach_lock` before adding themselves to the
subdevice wait queue, so fix the problem in the `COMEDI_DEVCONFIG` ioctl
handler by write-locking `dev->attach_lock` before checking that all of
the subdevices are safe to be deleted. This includes testing for any
sleepers on the subdevices' wait queues. It remains locked until the
device has been detached. This requires the `comedi_device_detach()`
function to be refactored slightly, moving the bulk of it into new
function `comedi_device_detach_locked()`.
Note that the refactor of `comedi_device_detach()` results in
`comedi_device_cancel_all()` now being called while `dev->attach_lock`
is write-locked, which wasn't the case previously, but that does not
matter.
Thanks to Jens Axboe for diagnosing the problem and co-developing this
patch.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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，该漏洞源于轮询和分离操作竞争条件，可能导致释放后重用。
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-2025-38687 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 · 2025-09-04 · 共 52 条
| CVE-2025-38708 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38724 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38728 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38688 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38697 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38722 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38685 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38718 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38717 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38715 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38710 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38730 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38703 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38714 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38679 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38713 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38707 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38680 | Linux kernel 安全漏洞 | |
| CVE-2025-38693 | Linux kernel 安全漏洞 | |
| CVE-2025-38694 | Linux kernel 安全漏洞 |
显示前 20 条，共 52 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38687
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