检测

Azure Linux 3.0 安全更新内核 (CVE-2024-46847)

medium Nessus 插件 ID 295638

语言：

简介

远程 Azure Linux 主机缺少一个或多个安全更新。

描述

远程 Azure Linux 3.0 主机上安装的内核版本低于 测试的版本。因此，该程序受到 CVE-2024-46847 公告中提及的一个漏洞影响。

 - 已修复 Linux 内核中的下列漏洞：mm: vmalloc: ensure vmap_block is initialised before adding to queue Commit 8c61291fd850 (mm: fix incorrect vbq reference in purge_fragmented_block) extended the 'vmap_block' structure to contain a 'cpu' field which is set at allocation time to the id of the initialising CPU. When a new 'vmap_block' is being instantiated by new_vmap_block(), the partially initialised structure is added to the local 'vmap_block_queue' xarray before the 'cpu' field has been initialised. If another CPU is concurrently walking the xarray (e.g. via vm_unmap_aliases()), then it May perform an out-of-bounds access to the remote queue thanks to an uninitialised index. This has been observed as UBSAN errors in Android: | Internal error: UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP | | Call trace: | purge_fragmented_block+0x204/0x21c | _vm_unmap_aliases+0x170/0x378 | vm_unmap_aliases+0x1c/0x28 | change_memory_common+0x1dc/0x26c | set_memory_ro+0x18/0x24 | module_enable_ro+0x98/0x238 | do_init_module+0x1b0/0x310 Move the initialisation of 'vb->cpu' in new_vmap_block() ahead of the addition to the xarray. (CVE-2024-46847)

请注意，Nessus 尚未测试此问题，而是只依据应用程序自我报告的版本号进行判断。

解决方案

更新受影响的程序包。

另见

https://nvd.nist.gov/vuln/detail/CVE-2024-46847

插件详情

严重性: Medium

ID: 295638

文件名: azure_linux_CVE-2024-46847.nasl

版本: 1.1

类型: local

发布时间: 2026/1/22

最近更新时间: 2026/1/22

支持的传感器: Nessus

风险信息

VPR

风险因素: Low

分数: 3.6

CVSS v2

风险因素: Medium

基本分数: 4.6

时间分数: 3.4

矢量: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS 分数来源: CVE-2024-46847

CVSS v3

风险因素: Medium

基本分数: 5.5

时间分数: 4.8

矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

时间矢量: CVSS:3.0/E:U/RL:O/RC:C

漏洞信息

CPE: p-cpe:/a:microsoft:azure_linux:kernel-debuginfo, p-cpe:/a:microsoft:azure_linux:kernel-devel, p-cpe:/a:microsoft:azure_linux:kernel-drivers-gpu, p-cpe:/a:microsoft:azure_linux:python3-perf, p-cpe:/a:microsoft:azure_linux:kernel-docs, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:kernel, p-cpe:/a:microsoft:azure_linux:kernel-drivers-sound, p-cpe:/a:microsoft:azure_linux:bpftool, p-cpe:/a:microsoft:azure_linux:kernel-drivers-accessibility, p-cpe:/a:microsoft:azure_linux:kernel-tools

必需的 KB 项: Host/local_checks_enabled, Host/cpu, Host/AzureLinux/release, Host/AzureLinux/rpm-list

易利用性: No known exploits are available

补丁发布日期: 2024/10/8

漏洞发布日期: 2024/9/27

参考资料信息

CVE: CVE-2024-46847