CVE-2025-40048— 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，该漏洞源于中断掩码控制不当，可能导致中断丢失和系统挂起。
可能的 ATT&CK 技术 1 AI
T1055 · Process Injection影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 95096f2fbd10186d3e78a328b327afc71428f65f< 540aac117eaea5723cef5e4cbf3035c4ac654d92 |
affected |
95096f2fbd10186d3e78a328b327afc71428f65f< 65d40acd911c7011745cbbd2aaac34eb5266d11e |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< a44f61f878f32071d6378e8dd7c2d47f9490c8f7 |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< 01ce972e6f9974a7c76943bcb7e93746917db83a |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< 2af39ab5e6dc46b835a52e80a22d0cad430985e3 |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< 37bd91f22794dc05436130d6983302cb90ecfe7e |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< e29587c07537929684faa365027f4b0d87521e1b |
affected | ||
95096f2fbd10186d3e78a328b327afc71428f65f< b15b7d2a1b09ef5428a8db260251897405a19496 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-40048 基础信息
漏洞信息
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Vulnerability Title
uio_hv_generic: Let userspace take care of interrupt mask
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
uio_hv_generic: Let userspace take care of interrupt mask
Remove the logic to set interrupt mask by default in uio_hv_generic
driver as the interrupt mask value is supposed to be controlled
completely by the user space. If the mask bit gets changed
by the driver, concurrently with user mode operating on the ring,
the mask bit may be set when it is supposed to be clear, and the
user-mode driver will miss an interrupt which will cause a hang.
For eg- when the driver sets inbound ring buffer interrupt mask to 1,
the host does not interrupt the guest on the UIO VMBus channel.
However, setting the mask does not prevent the host from putting a
message in the inbound ring buffer. So let’s assume that happens,
the host puts a message into the ring buffer but does not interrupt.
Subsequently, the user space code in the guest sets the inbound ring
buffer interrupt mask to 0, saying “Hey, I’m ready for interrupts”.
User space code then calls pread() to wait for an interrupt.
Then one of two things happens:
* The host never sends another message. So the pread() waits forever.
* The host does send another message. But because there’s already a
message in the ring buffer, it doesn’t generate an interrupt.
This is the correct behavior, because the host should only send an
interrupt when the inbound ring buffer transitions from empty to
not-empty. Adding an additional message to a ring buffer that is not
empty is not supposed to generate an interrupt on the guest.
Since the guest is waiting in pread() and not removing messages from
the ring buffer, the pread() waits forever.
This could be easily reproduced in hv_fcopy_uio_daemon if we delay
setting interrupt mask to 0.
Similarly if hv_uio_channel_cb() sets the interrupt_mask to 1,
there’s a race condition. Once user space empties the inbound ring
buffer, but before user space sets interrupt_mask to 0, the host could
put another message in the ring buffer but it wouldn’t interrupt.
Then the next pread() would hang.
Fix these by removing all instances where interrupt_mask is changed,
while keeping the one in set_event() unchanged to enable userspace
control the interrupt mask by writing 0/1 to /dev/uioX.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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，该漏洞源于中断掩码控制不当，可能导致中断丢失和系统挂起。
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-2025-40048 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2025-40048 补丁与修复 (2)
同批安全公告 · Linux · 2025-10-28 · 共 58 条
| CVE-2025-40074 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40043 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40039 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40058 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40046 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40068 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40075 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40026 | 7.9 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40044 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40054 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40045 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40047 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40051 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40025 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40061 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40064 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40067 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40069 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40079 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40081 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 58 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-40048
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