CVE-2025-21632— 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，该漏洞源于在使用影子栈时，未检查影子栈是否已激活，可能导致在访问XSAVE缓冲区时触发警告。
可能的 ATT&CK 技术 1 AI
T1055 · Process Injection影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2fab02b25ae7cf5f714ab456b03d9a3fe5ae98c9< 0a3a872214188e4268d31581ed0cd44508e038cf |
affected |
2fab02b25ae7cf5f714ab456b03d9a3fe5ae98c9< 6bfe1fc22f462bec87422cdcbec4d7a2f43ff01d |
affected | ||
2fab02b25ae7cf5f714ab456b03d9a3fe5ae98c9< a9d9c33132d49329ada647e4514d210d15e31d81 |
affected | ||
6.6 |
affected | ||
< 6.6 |
unaffected | ||
6.6.72≤ 6.6.* |
unaffected | ||
6.12.10≤ 6.12.* |
unaffected | ||
6.13≤ * |
unaffected |
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2025-21632 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
x86/fpu: Ensure shadow stack is active before "getting" registers
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
x86/fpu: Ensure shadow stack is active before "getting" registers
The x86 shadow stack support has its own set of registers. Those registers
are XSAVE-managed, but they are "supervisor state components" which means
that userspace can not touch them with XSAVE/XRSTOR. It also means that
they are not accessible from the existing ptrace ABI for XSAVE state.
Thus, there is a new ptrace get/set interface for it.
The regset code that ptrace uses provides an ->active() handler in
addition to the get/set ones. For shadow stack this ->active() handler
verifies that shadow stack is enabled via the ARCH_SHSTK_SHSTK bit in the
thread struct. The ->active() handler is checked from some call sites of
the regset get/set handlers, but not the ptrace ones. This was not
understood when shadow stack support was put in place.
As a result, both the set/get handlers can be called with
XFEATURE_CET_USER in its init state, which would cause get_xsave_addr() to
return NULL and trigger a WARN_ON(). The ssp_set() handler luckily has an
ssp_active() check to avoid surprising the kernel with shadow stack
behavior when the kernel is not ready for it (ARCH_SHSTK_SHSTK==0). That
check just happened to avoid the warning.
But the ->get() side wasn't so lucky. It can be called with shadow stacks
disabled, triggering the warning in practice, as reported by Christina
Schimpe:
WARNING: CPU: 5 PID: 1773 at arch/x86/kernel/fpu/regset.c:198 ssp_get+0x89/0xa0
[...]
Call Trace:
<TASK>
? show_regs+0x6e/0x80
? ssp_get+0x89/0xa0
? __warn+0x91/0x150
? ssp_get+0x89/0xa0
? report_bug+0x19d/0x1b0
? handle_bug+0x46/0x80
? exc_invalid_op+0x1d/0x80
? asm_exc_invalid_op+0x1f/0x30
? __pfx_ssp_get+0x10/0x10
? ssp_get+0x89/0xa0
? ssp_get+0x52/0xa0
__regset_get+0xad/0xf0
copy_regset_to_user+0x52/0xc0
ptrace_regset+0x119/0x140
ptrace_request+0x13c/0x850
? wait_task_inactive+0x142/0x1d0
? do_syscall_64+0x6d/0x90
arch_ptrace+0x102/0x300
[...]
Ensure that shadow stacks are active in a thread before looking them up
in the XSAVE buffer. Since ARCH_SHSTK_SHSTK and user_ssp[SHSTK_EN] are
set at the same time, the active check ensures that there will be
something to find in the XSAVE buffer.
[ dhansen: changelog/subject tweaks ]
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，该漏洞源于在使用影子栈时，未检查影子栈是否已激活，可能导致在访问XSAVE缓冲区时触发警告。
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-2025-21632 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2025-21632 的情报信息
请登录查看更多情报信息。
CVE-2025-21632 补丁与修复 (3)
同批安全公告 · Linux · 2025-01-19 · 共 47 条
| CVE-2024-57929 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21631 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21652 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57918 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57921 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57926 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21646 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21647 | 7.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21637 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21650 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21640 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21638 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57927 | Linux kernel 安全漏洞 | |
| CVE-2024-57925 | Linux kernel 安全漏洞 | |
| CVE-2024-57914 | Linux kernel 安全漏洞 | |
| CVE-2024-57913 | Linux kernel 安全漏洞 | |
| CVE-2024-57911 | Linux kernel 安全漏洞 | |
| CVE-2024-57910 | Linux kernel 安全漏洞 | |
| CVE-2024-57916 | Linux kernel 安全漏洞 | |
| CVE-2024-57912 | Linux kernel 安全漏洞 |
显示前 20 条，共 47 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21632
暂无评论