检测

Azure Linux 3.0 安全更新内核 (CVE-2025-38415)

high Nessus 插件 ID 295548

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-2025-38415 公告中提及的一个漏洞影响。

 - 已修复 Linux 内核中的下列漏洞：Squashfs: check return result of sb_min_blocksize Syzkaller reports an UBSAN: shift-out-of-bounds in squashfs_bio_read bug. Syzkaller forks multiple processes which after mounting the Squashfs filesystem, issues an ioctl(/dev/loop0, LOOP_SET_BLOCK_SIZE, 0x8000). Now if this ioctl occurs at the same time another process is in the process of mounting a Squashfs filesystem on /dev/loop0, the failure occurs. When this happens the following code in squashfs_fill_super() fails. ---- msblk->devblksize = sb_min_blocksize(sb, SQUASHFS_DEVBLK_SIZE);
 msblk->devblksize_log2 = ffz(~msblk->devblksize); ---- sb_min_blocksize() returns 0, which means msblk->devblksize is set to 0. As a result, ffz(~msblk->devblksize) returns 64, and msblk->devblksize_log2 is set to 64. This subsequently causes the UBSAN: shift-out-of-bounds in fs/squashfs/block.c:195:36 shift exponent 64 is too large for 64-bit type 'u64' (aka 'unsigned long long') This commit adds a check for a 0 return by sb_min_blocksize(). (CVE-2025-38415)

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-2025-38415

插件详情

严重性: High

ID: 295548

文件名: azure_linux_CVE-2025-38415.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: Medium

分数: 6.7

CVSS v2

风险因素: Medium

基本分数: 6.8

时间分数: 5

矢量: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS 分数来源: CVE-2025-38415

CVSS v3

风险因素: High

基本分数: 7.8

时间分数: 6.8

矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-intree-amdgpu, 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/AzureLinux/release, Host/AzureLinux/rpm-list, Host/cpu

易利用性: No known exploits are available

补丁发布日期: 2025/8/12

漏洞发布日期: 2025/7/10

参考资料信息

CVE: CVE-2025-38415