摘要:
kernel security update
安全等级: High
公告ID: KylinSec-SA-2025-2785
发布日期: 2025年8月14日
关联CVE: CVE-2025-38424
The Linux Kernel, the operating system core itself.
Security Fix(es):
In the Linux kernel, the following vulnerability has been resolved:
perf: Fix sample vs do_exit()
Baisheng Gao reported an ARM64 crash, which Mark decoded as being a
synchronous external abort -- most likely due to trying to access
MMIO in bad ways.
The crash further shows perf trying to do a user stack sample while in
exit_mmap()'s tlb_finish_mmu() -- i.e. while tearing down the address
space it is trying to access.
It turns out that we stop perf after we tear down the userspace mm; a
receipie for disaster, since perf likes to access userspace for
various reasons.
Flip this order by moving up where we stop perf in do_exit().
Additionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER
to abort when the current task does not have an mm (exit_mm() makes
sure to set current->mm = NULL; before commencing with the actual
teardown). Such that CPU wide events don't trip on this same problem.(CVE-2025-38424)
| cve名称 | 产品 | 组件 | 是否受影响 |
|---|---|---|---|
| CVE-2025-38424 | KY3.4-5A | kernel | Fixed |
| 软件名称 | 架构 | 版本号 |
|---|---|---|
| bpftool | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-devel | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-source | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-tools | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-tools-devel | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| perf | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| python2-perf | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| python3-perf | x86_64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| bpftool | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-devel | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-source | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-tools | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| kernel-tools-devel | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| perf | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| python2-perf | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
| python3-perf | aarch64 | 4.19.90-2408.1.0.0288.kb28.ky3_4 |
方法一：下载安装包进行升级安装
1、通过下载链接下载需要升级的升级包保存，如 xxx.rpm
2、通过rpm命令升级，如 rpm -Uvh xxx.rpm
方法二：通过软件源进行升级安装
1、保持能够连接上互联网
2、通过yum命令升级指定的包，如 yum install 包名
