CVE-2024-31076— 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genirq/cpuhotplug,x86/vector模块存在问题。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< a40209d355afe4ed6d533507838c9e5cd70a76d8 |
affected |
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< f5f4675960609d8c5ee95f027fbf6ce380f98372 |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< 6752dfcfff3ac3e16625ebd3f0ad9630900e7e76 |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< 9eeda3e0071a329af1eba15f4e57dc39576bb420 |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< e9c96d01d520498b169ce734a8ad1142bef86a30 |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< 59f86a2908380d09cdc726461c0fbb8d8579c99f |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< ebfb16fc057a016abb46a9720a54abf0d4f6abe1 |
affected | ||
f0383c24b4855f6a4b5a358c7b2d2c16e0437e9b< a6c11c0a5235fb144a65e0cb2ffd360ddc1f6c32 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2024-31076 基础信息
漏洞信息
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Vulnerability Title
genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
The absence of IRQD_MOVE_PCNTXT prevents immediate effectiveness of
interrupt affinity reconfiguration via procfs. Instead, the change is
deferred until the next instance of the interrupt being triggered on the
original CPU.
When the interrupt next triggers on the original CPU, the new affinity is
enforced within __irq_move_irq(). A vector is allocated from the new CPU,
but the old vector on the original CPU remains and is not immediately
reclaimed. Instead, apicd->move_in_progress is flagged, and the reclaiming
process is delayed until the next trigger of the interrupt on the new CPU.
Upon the subsequent triggering of the interrupt on the new CPU,
irq_complete_move() adds a task to the old CPU's vector_cleanup list if it
remains online. Subsequently, the timer on the old CPU iterates over its
vector_cleanup list, reclaiming old vectors.
However, a rare scenario arises if the old CPU is outgoing before the
interrupt triggers again on the new CPU.
In that case irq_force_complete_move() is not invoked on the outgoing CPU
to reclaim the old apicd->prev_vector because the interrupt isn't currently
affine to the outgoing CPU, and irq_needs_fixup() returns false. Even
though __vector_schedule_cleanup() is later called on the new CPU, it
doesn't reclaim apicd->prev_vector; instead, it simply resets both
apicd->move_in_progress and apicd->prev_vector to 0.
As a result, the vector remains unreclaimed in vector_matrix, leading to a
CPU vector leak.
To address this issue, move the invocation of irq_force_complete_move()
before the irq_needs_fixup() call to reclaim apicd->prev_vector, if the
interrupt is currently or used to be affine to the outgoing CPU.
Additionally, reclaim the vector in __vector_schedule_cleanup() as well,
following a warning message, although theoretically it should never see
apicd->move_in_progress with apicd->prev_cpu pointing to an offline CPU.
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genirq/cpuhotplug,x86/vector模块存在问题。
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-2024-31076 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-31076 邮件列表归档 (1)
CVE-2024-31076 其他参考 (8)
同批安全公告 · Linux · 2024-06-21 · 共 40 条
| CVE-2024-36288 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-38381 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-33619 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38628 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36477 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38626 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36286 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38623 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38635 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38388 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-38659 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36481 | Linux kernel 安全漏洞 | |
| CVE-2024-38662 | Linux kernel 安全漏洞 | |
| CVE-2024-38637 | Linux kernel 安全漏洞 | |
| CVE-2024-38636 | Linux kernel 安全漏洞 | |
| CVE-2024-38780 | Linux kernel 安全漏洞 | |
| CVE-2024-39277 | Linux kernel 安全漏洞 | |
| CVE-2024-38634 | Linux kernel 安全漏洞 | |
| CVE-2024-34777 | Linux kernel 安全漏洞 | |
| CVE-2024-38633 | Linux kernel 安全漏洞 |
显示前 20 条，共 40 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-31076
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