CVE-2024-35980— 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，该漏洞源于传递给 TLBI RANGE 指令的操作数未正确排序，这会导致实时迁移后目标虚拟机崩溃。
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 117940aa6e5f8308f1529e1313660980f1dae771< ac4ad513de4fba18b4ac0ace132777d0910e8cfa |
affected |
117940aa6e5f8308f1529e1313660980f1dae771< 944db7b536baaf49d7e576af36a94f4719552b07 |
affected | ||
117940aa6e5f8308f1529e1313660980f1dae771< e3ba51ab24fddef79fc212f9840de54db8fd1685 |
affected | ||
6.6 |
affected | ||
< 6.6 |
unaffected | ||
6.6.29≤ 6.6.* |
unaffected | ||
6.8.7≤ 6.8.* |
unaffected | ||
6.9≤ * |
unaffected |
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一、 漏洞 CVE-2024-35980 基础信息
漏洞信息
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Vulnerability Title
arm64: tlb: Fix TLBI RANGE operand
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
arm64: tlb: Fix TLBI RANGE operand
KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty
pages are collected by VMM and the page table entries become write
protected during live migration. Unfortunately, the operand passed
to the TLBI RANGE instruction isn't correctly sorted out due to the
commit 117940aa6e5f ("KVM: arm64: Define kvm_tlb_flush_vmid_range()").
It leads to crash on the destination VM after live migration because
TLBs aren't flushed completely and some of the dirty pages are missed.
For example, I have a VM where 8GB memory is assigned, starting from
0x40000000 (1GB). Note that the host has 4KB as the base page size.
In the middile of migration, kvm_tlb_flush_vmid_range() is executed
to flush TLBs. It passes MAX_TLBI_RANGE_PAGES as the argument to
__kvm_tlb_flush_vmid_range() and __flush_s2_tlb_range_op(). SCALE#3
and NUM#31, corresponding to MAX_TLBI_RANGE_PAGES, isn't supported
by __TLBI_RANGE_NUM(). In this specific case, -1 has been returned
from __TLBI_RANGE_NUM() for SCALE#3/2/1/0 and rejected by the loop
in the __flush_tlb_range_op() until the variable @scale underflows
and becomes -9, 0xffff708000040000 is set as the operand. The operand
is wrong since it's sorted out by __TLBI_VADDR_RANGE() according to
invalid @scale and @num.
Fix it by extending __TLBI_RANGE_NUM() to support the combination of
SCALE#3 and NUM#31. With the changes, [-1 31] instead of [-1 30] can
be returned from the macro, meaning the TLBs for 0x200000 pages in the
above example can be flushed in one shoot with SCALE#3 and NUM#31. The
macro TLBI_RANGE_MASK is dropped since no one uses it any more. The
comments are also adjusted accordingly.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/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，该漏洞源于传递给 TLBI RANGE 指令的操作数未正确排序，这会导致实时迁移后目标虚拟机崩溃。
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-2024-35980 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-35980 其他参考 (3)
同批安全公告 · Linux · 2024-05-20 · 共 62 条
| CVE-2024-35969 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35987 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35948 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36001 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36007 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35993 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35994 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35990 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-36009 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35968 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35958 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35954 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35951 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35950 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35949 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35979 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35999 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35971 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35998 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-35976 | 7.1 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 62 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-35980
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