CVE-2024-39483— 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。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fa4c027a7956f5e07697bfcb580d25eeb8471257< f79edaf7370986d73d204b36c50cc563a4c0f356 |
affected |
fa4c027a7956f5e07697bfcb580d25eeb8471257< 1d87cf2eba46deaff6142366127f2323de9f84d1 |
affected | ||
fa4c027a7956f5e07697bfcb580d25eeb8471257< b4bd556467477420ee3a91fbcba73c579669edc6 |
affected | ||
6.4 |
affected | ||
< 6.4 |
unaffected | ||
6.6.34≤ 6.6.* |
unaffected | ||
6.9.5≤ 6.9.* |
unaffected | ||
6.10≤ * |
unaffected |
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一、 漏洞 CVE-2024-39483 基础信息
漏洞信息
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Vulnerability Title
KVM: SVM: WARN on vNMI + NMI window iff NMIs are outright masked
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: WARN on vNMI + NMI window iff NMIs are outright masked
When requesting an NMI window, WARN on vNMI support being enabled if and
only if NMIs are actually masked, i.e. if the vCPU is already handling an
NMI. KVM's ABI for NMIs that arrive simultanesouly (from KVM's point of
view) is to inject one NMI and pend the other. When using vNMI, KVM pends
the second NMI simply by setting V_NMI_PENDING, and lets the CPU do the
rest (hardware automatically sets V_NMI_BLOCKING when an NMI is injected).
However, if KVM can't immediately inject an NMI, e.g. because the vCPU is
in an STI shadow or is running with GIF=0, then KVM will request an NMI
window and trigger the WARN (but still function correctly).
Whether or not the GIF=0 case makes sense is debatable, as the intent of
KVM's behavior is to provide functionality that is as close to real
hardware as possible. E.g. if two NMIs are sent in quick succession, the
probability of both NMIs arriving in an STI shadow is infinitesimally low
on real hardware, but significantly larger in a virtual environment, e.g.
if the vCPU is preempted in the STI shadow. For GIF=0, the argument isn't
as clear cut, because the window where two NMIs can collide is much larger
in bare metal (though still small).
That said, KVM should not have divergent behavior for the GIF=0 case based
on whether or not vNMI support is enabled. And KVM has allowed
simultaneous NMIs with GIF=0 for over a decade, since commit 7460fb4a3400
("KVM: Fix simultaneous NMIs"). I.e. KVM's GIF=0 handling shouldn't be
modified without a *really* good reason to do so, and if KVM's behavior
were to be modified, it should be done irrespective of vNMI support.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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-2024-39483 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-39483 其他参考 (3)
同批安全公告 · Linux · 2024-07-05 · 共 14 条
| CVE-2024-39480 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39482 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39481 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39479 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39478 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39477 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39472 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-39485 | Linux kernel 安全漏洞 | |
| CVE-2024-39484 | Linux kernel 安全漏洞 | |
| CVE-2024-39476 | Linux kernel 安全漏洞 | |
| CVE-2024-39475 | Linux kernel 安全漏洞 | |
| CVE-2024-39474 | Linux kernel 安全漏洞 | |
| CVE-2024-39473 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2024-39483
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