CVE-2022-50202— 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，该漏洞源于设备探测死锁，可能导致系统挂起。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c751085943362143f84346d274e0011419c84202< 8c90947e5f1801e6c7120021c6ea0f3ad6a4eb91 |
affected |
c751085943362143f84346d274e0011419c84202< 5a283b59bce72c05c60e9f0fa92a28b5b850d8bb |
affected | ||
c751085943362143f84346d274e0011419c84202< 3c48d3067eaf878642276f053575a5c642600a50 |
affected | ||
c751085943362143f84346d274e0011419c84202< 003a456ae6f70bb97e436e02fc5105be577c1570 |
affected | ||
c751085943362143f84346d274e0011419c84202< 2f0e18e0db42f4f8bc87d3d98333680065ceeff8 |
affected | ||
c751085943362143f84346d274e0011419c84202< b8e1ae9433d7bd95f2dcc044a7a6f20a4c40d258 |
affected | ||
c751085943362143f84346d274e0011419c84202< f7042cf9dd40733f387b7cac021e626c74b8856f |
affected | ||
c751085943362143f84346d274e0011419c84202< 8386c414e27caba8501119948e9551e52b527f59 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2022-50202 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
PM: hibernate: defer device probing when resuming from hibernation
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
PM: hibernate: defer device probing when resuming from hibernation
syzbot is reporting hung task at misc_open() [1], for there is a race
window of AB-BA deadlock which involves probe_count variable. Currently
wait_for_device_probe() from snapshot_open() from misc_open() can sleep
forever with misc_mtx held if probe_count cannot become 0.
When a device is probed by hub_event() work function, probe_count is
incremented before the probe function starts, and probe_count is
decremented after the probe function completed.
There are three cases that can prevent probe_count from dropping to 0.
(a) A device being probed stopped responding (i.e. broken/malicious
hardware).
(b) A process emulating a USB device using /dev/raw-gadget interface
stopped responding for some reason.
(c) New device probe requests keeps coming in before existing device
probe requests complete.
The phenomenon syzbot is reporting is (b). A process which is holding
system_transition_mutex and misc_mtx is waiting for probe_count to become
0 inside wait_for_device_probe(), but the probe function which is called
from hub_event() work function is waiting for the processes which are
blocked at mutex_lock(&misc_mtx) to respond via /dev/raw-gadget interface.
This patch mitigates (b) by deferring wait_for_device_probe() from
snapshot_open() to snapshot_write() and snapshot_ioctl(). Please note that
the possibility of (b) remains as long as any thread which is emulating a
USB device via /dev/raw-gadget interface can be blocked by uninterruptible
blocking operations (e.g. mutex_lock()).
Please also note that (a) and (c) are not addressed. Regarding (c), we
should change the code to wait for only one device which contains the
image for resuming from hibernation. I don't know how to address (a), for
use of timeout for wait_for_device_probe() might result in loss of user
data in the image. Maybe we should require the userland to wait for the
image device before opening /dev/snapshot interface.
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，该漏洞源于设备探测死锁，可能导致系统挂起。
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-2022-50202 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 · 2025-06-18 · 共 362 条
| CVE-2025-38075 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-50098 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38052 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49934 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50164 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38016 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38074 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49974 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49968 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49944 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49950 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49939 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50028 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49935 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38082 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38080 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38079 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38060 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-50101 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38062 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 362 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-50202
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