CVE-2025-37936— 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perf/x86/intel中PEBS_ENABLE未按vCPU值屏蔽。
影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c59a1f106f5cd4843c097069ff1bb2ad72103a67< 160153cf9e4aa875ad086cc094ce34aac8e13d63 |
affected |
c59a1f106f5cd4843c097069ff1bb2ad72103a67< 34b6fa11431aef71045ae5a00d90a7d630597eda |
affected | ||
c59a1f106f5cd4843c097069ff1bb2ad72103a67< 44ee0afc9d1e7a7c1932698de01362ed80cfc4b5 |
affected | ||
c59a1f106f5cd4843c097069ff1bb2ad72103a67< 86aa62895fc2fb7ab09d7ca40fae8ad09841f66b |
affected | ||
c59a1f106f5cd4843c097069ff1bb2ad72103a67< 58f6217e5d0132a9f14e401e62796916aa055c1b |
affected | ||
6.0 |
affected | ||
< 6.0 |
unaffected | ||
6.1.138≤ 6.1.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2025-37936 基础信息
漏洞信息
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Vulnerability Title
perf/x86/intel: KVM: Mask PEBS_ENABLE loaded for guest with vCPU's value.
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
perf/x86/intel: KVM: Mask PEBS_ENABLE loaded for guest with vCPU's value.
When generating the MSR_IA32_PEBS_ENABLE value that will be loaded on
VM-Entry to a KVM guest, mask the value with the vCPU's desired PEBS_ENABLE
value. Consulting only the host kernel's host vs. guest masks results in
running the guest with PEBS enabled even when the guest doesn't want to use
PEBS. Because KVM uses perf events to proxy the guest virtual PMU, simply
looking at exclude_host can't differentiate between events created by host
userspace, and events created by KVM on behalf of the guest.
Running the guest with PEBS unexpectedly enabled typically manifests as
crashes due to a near-infinite stream of #PFs. E.g. if the guest hasn't
written MSR_IA32_DS_AREA, the CPU will hit page faults on address '0' when
trying to record PEBS events.
The issue is most easily reproduced by running `perf kvm top` from before
commit 7b100989b4f6 ("perf evlist: Remove __evlist__add_default") (after
which, `perf kvm top` effectively stopped using PEBS). The userspace side
of perf creates a guest-only PEBS event, which intel_guest_get_msrs()
misconstrues a guest-*owned* PEBS event.
Arguably, this is a userspace bug, as enabling PEBS on guest-only events
simply cannot work, and userspace can kill VMs in many other ways (there
is no danger to the host). However, even if this is considered to be bad
userspace behavior, there's zero downside to perf/KVM restricting PEBS to
guest-owned events.
Note, commit 854250329c02 ("KVM: x86/pmu: Disable guest PEBS temporarily
in two rare situations") fixed the case where host userspace is profiling
KVM *and* userspace, but missed the case where userspace is profiling only
KVM.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/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perf/x86/intel中PEBS_ENABLE未按vCPU值屏蔽。
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-2025-37936 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-37936 补丁与修复 (2)
同批安全公告 · Linux · 2025-05-20 · 共 95 条
| CVE-2025-37894 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37924 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37935 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37959 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-37926 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37899 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37918 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37944 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37943 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37947 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37952 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37956 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37957 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37973 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37977 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37920 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37921 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37923 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37903 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-37901 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 95 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-37936
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