CVE-2025-21951— 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mhi主机驱动使用pci_reset_function可能导致死锁。
影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7389337f0a78ea099c47f0af08f64f20c52ab4ba< 7746f3bb8917fccb4571a576f3837d80fc513054 |
affected |
7389337f0a78ea099c47f0af08f64f20c52ab4ba< 7a5ffadd54fe2662f5c99cdccf30144d060376f7 |
affected | ||
7389337f0a78ea099c47f0af08f64f20c52ab4ba< 1f9eb7078bc6b5fb5cbfbcb37c4bc01685332b95 |
affected | ||
7389337f0a78ea099c47f0af08f64f20c52ab4ba< 985d3cf56d8745ca637deee273929e01df449f85 |
affected | ||
7389337f0a78ea099c47f0af08f64f20c52ab4ba< 62505657475c245c9cd46e42ac01026d1e61f027 |
affected | ||
7389337f0a78ea099c47f0af08f64f20c52ab4ba< a321d163de3d8aa38a6449ab2becf4b1581aed96 |
affected | ||
5.12 |
affected | ||
< 5.12 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2025-21951 基础信息
漏洞信息
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Vulnerability Title
bus: mhi: host: pci_generic: Use pci_try_reset_function() to avoid deadlock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
bus: mhi: host: pci_generic: Use pci_try_reset_function() to avoid deadlock
There are multiple places from where the recovery work gets scheduled
asynchronously. Also, there are multiple places where the caller waits
synchronously for the recovery to be completed. One such place is during
the PM shutdown() callback.
If the device is not alive during recovery_work, it will try to reset the
device using pci_reset_function(). This function internally will take the
device_lock() first before resetting the device. By this time, if the lock
has already been acquired, then recovery_work will get stalled while
waiting for the lock. And if the lock was already acquired by the caller
which waits for the recovery_work to be completed, it will lead to
deadlock.
This is what happened on the X1E80100 CRD device when the device died
before shutdown() callback. Driver core calls the driver's shutdown()
callback while holding the device_lock() leading to deadlock.
And this deadlock scenario can occur on other paths as well, like during
the PM suspend() callback, where the driver core would hold the
device_lock() before calling driver's suspend() callback. And if the
recovery_work was already started, it could lead to deadlock. This is also
observed on the X1E80100 CRD.
So to fix both issues, use pci_try_reset_function() in recovery_work. This
function first checks for the availability of the device_lock() before
trying to reset the device. If the lock is available, it will acquire it
and reset the device. Otherwise, it will return -EAGAIN. If that happens,
recovery_work will fail with the error message "Recovery failed" as not
much could be done.
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mhi主机驱动使用pci_reset_function可能导致死锁。
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-2025-21951 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 · 2025-04-01 · 共 93 条
| CVE-2025-21954 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21927 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21955 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21946 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21945 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21969 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21967 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21972 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21947 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21896 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21971 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21899 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21979 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21926 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21966 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21965 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21934 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21939 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21958 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21949 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21951
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