CVE-2025-38670— 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，该漏洞源于未屏蔽DAIF标志，可能导致堆栈不匹配。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 21
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 3f225f29c69c13ce1cbdb1d607a42efeef080056< f7e0231eeaa33245c649fac0303cf97209605446 |
affected |
402d2b1d54b7085d0c3bfd01fd50c2701dde64b3< 407047893a64399f2d2390ff35cc6061107d805d |
affected | ||
4403c7b7e5e1ad09a266b6e399fd7bf97931508e< a6b0cb523eaa01efe8a3f76ced493ba60674c6e6 |
affected | ||
59b37fe52f49955791a460752c37145f1afdcad1< 9433a5f437b0948d6a2d8a02ad7a42ab7ca27a61 |
affected | ||
59b37fe52f49955791a460752c37145f1afdcad1< 708fd522b86d2a9544c34ec6a86fa3fc23336525 |
affected | ||
59b37fe52f49955791a460752c37145f1afdcad1< 0f67015d72627bad72da3c2084352e0aa134416b |
affected | ||
59b37fe52f49955791a460752c37145f1afdcad1< d42e6c20de6192f8e4ab4cf10be8c694ef27e8cb |
affected | ||
e47ce4f11e26fa3ea99b09521da8b3ac3a7b578d |
affected | ||
| … +13 条更多 | |||
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一、 漏洞 CVE-2025-38670 基础信息
漏洞信息
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Vulnerability Title
arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack()
`cpu_switch_to()` and `call_on_irq_stack()` manipulate SP to change
to different stacks along with the Shadow Call Stack if it is enabled.
Those two stack changes cannot be done atomically and both functions
can be interrupted by SErrors or Debug Exceptions which, though unlikely,
is very much broken : if interrupted, we can end up with mismatched stacks
and Shadow Call Stack leading to clobbered stacks.
In `cpu_switch_to()`, it can happen when SP_EL0 points to the new task,
but x18 stills points to the old task's SCS. When the interrupt handler
tries to save the task's SCS pointer, it will save the old task
SCS pointer (x18) into the new task struct (pointed to by SP_EL0),
clobbering it.
In `call_on_irq_stack()`, it can happen when switching from the task stack
to the IRQ stack and when switching back. In both cases, we can be
interrupted when the SCS pointer points to the IRQ SCS, but SP points to
the task stack. The nested interrupt handler pushes its return addresses
on the IRQ SCS. It then detects that SP points to the task stack,
calls `call_on_irq_stack()` and clobbers the task SCS pointer with
the IRQ SCS pointer, which it will also use !
This leads to tasks returning to addresses on the wrong SCS,
or even on the IRQ SCS, triggering kernel panics via CONFIG_VMAP_STACK
or FPAC if enabled.
This is possible on a default config, but unlikely.
However, when enabling CONFIG_ARM64_PSEUDO_NMI, DAIF is unmasked and
instead the GIC is responsible for filtering what interrupts the CPU
should receive based on priority.
Given the goal of emulating NMIs, pseudo-NMIs can be received by the CPU
even in `cpu_switch_to()` and `call_on_irq_stack()`, possibly *very*
frequently depending on the system configuration and workload, leading
to unpredictable kernel panics.
Completely mask DAIF in `cpu_switch_to()` and restore it when returning.
Do the same in `call_on_irq_stack()`, but restore and mask around
the branch.
Mask DAIF even if CONFIG_SHADOW_CALL_STACK is not enabled for consistency
of behaviour between all configurations.
Introduce and use an assembly macro for saving and masking DAIF,
as the existing one saves but only masks IF.
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，该漏洞源于未屏蔽DAIF标志，可能导致堆栈不匹配。
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-2025-38670 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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同批安全公告 · Linux · 2025-08-22 · 共 60 条
| CVE-2025-38660 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38643 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38658 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-58239 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38640 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38675 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38627 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38653 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38659 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38656 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38619 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38617 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38618 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38667 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38616 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38652 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38657 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38661 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38662 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38639 | 7.1 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 60 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38670
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