CVE-2025-21866— 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，该漏洞源于未正确标记文本修补区域，可能导致越界访问。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< 97de5852058a299ba447cd9782fe96488d30108b |
affected |
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< f8d4c5b653c1bc0df56e15658bbf64fc359adc4e |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< 6847b3e40bb963e57b61d1cc6fe84cb37b9d3d4c |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< c905a3053518212a1017e50bd2be3bee59305bb0 |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< 2d542f13d26344e3452eee77613026ce9b653065 |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< 8d06e9208184b2851fa79a3a39d6860320c8bdf8 |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< 2e6c80423f201405fd65254e52decd21663896f3 |
affected | ||
37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1< d262a192d38e527faa5984629aabda2e0d1c4f54 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-21866 基础信息
漏洞信息
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Vulnerability Title
powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC
Erhard reported the following KASAN hit while booting his PowerMac G4
with a KASAN-enabled kernel 6.13-rc6:
BUG: KASAN: vmalloc-out-of-bounds in copy_to_kernel_nofault+0xd8/0x1c8
Write of size 8 at addr f1000000 by task chronyd/1293
CPU: 0 UID: 123 PID: 1293 Comm: chronyd Tainted: G W 6.13.0-rc6-PMacG4 #2
Tainted: [W]=WARN
Hardware name: PowerMac3,6 7455 0x80010303 PowerMac
Call Trace:
[c2437590] [c1631a84] dump_stack_lvl+0x70/0x8c (unreliable)
[c24375b0] [c0504998] print_report+0xdc/0x504
[c2437610] [c050475c] kasan_report+0xf8/0x108
[c2437690] [c0505a3c] kasan_check_range+0x24/0x18c
[c24376a0] [c03fb5e4] copy_to_kernel_nofault+0xd8/0x1c8
[c24376c0] [c004c014] patch_instructions+0x15c/0x16c
[c2437710] [c00731a8] bpf_arch_text_copy+0x60/0x7c
[c2437730] [c0281168] bpf_jit_binary_pack_finalize+0x50/0xac
[c2437750] [c0073cf4] bpf_int_jit_compile+0xb30/0xdec
[c2437880] [c0280394] bpf_prog_select_runtime+0x15c/0x478
[c24378d0] [c1263428] bpf_prepare_filter+0xbf8/0xc14
[c2437990] [c12677ec] bpf_prog_create_from_user+0x258/0x2b4
[c24379d0] [c027111c] do_seccomp+0x3dc/0x1890
[c2437ac0] [c001d8e0] system_call_exception+0x2dc/0x420
[c2437f30] [c00281ac] ret_from_syscall+0x0/0x2c
--- interrupt: c00 at 0x5a1274
NIP: 005a1274 LR: 006a3b3c CTR: 005296c8
REGS: c2437f40 TRAP: 0c00 Tainted: G W (6.13.0-rc6-PMacG4)
MSR: 0200f932 <VEC,EE,PR,FP,ME,IR,DR,RI> CR: 24004422 XER: 00000000
GPR00: 00000166 af8f3fa0 a7ee3540 00000001 00000000 013b6500 005a5858 0200f932
GPR08: 00000000 00001fe9 013d5fc8 005296c8 2822244c 00b2fcd8 00000000 af8f4b57
GPR16: 00000000 00000001 00000000 00000000 00000000 00000001 00000000 00000002
GPR24: 00afdbb0 00000000 00000000 00000000 006e0004 013ce060 006e7c1c 00000001
NIP [005a1274] 0x5a1274
LR [006a3b3c] 0x6a3b3c
--- interrupt: c00
The buggy address belongs to the virtual mapping at
[f1000000, f1002000) created by:
text_area_cpu_up+0x20/0x190
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x76e30
flags: 0x80000000(zone=2)
raw: 80000000 00000000 00000122 00000000 00000000 00000000 ffffffff 00000001
raw: 00000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
f0ffff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0ffff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>f1000000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
f1000080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
f1000100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
f8 corresponds to KASAN_VMALLOC_INVALID which means the area is not
initialised hence not supposed to be used yet.
Powerpc text patching infrastructure allocates a virtual memory area
using get_vm_area() and flags it as VM_ALLOC. But that flag is meant
to be used for vmalloc() and vmalloc() allocated memory is not
supposed to be used before a call to __vmalloc_node_range() which is
never called for that area.
That went undetected until commit e4137f08816b ("mm, kasan, kmsan:
instrument copy_from/to_kernel_nofault")
The area allocated by text_area_cpu_up() is not vmalloc memory, it is
mapped directly on demand when needed by map_kernel_page(). There is
no VM flag corresponding to such usage, so just pass no flag. That way
the area will be unpoisonned and usable immediately.
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，该漏洞源于未正确标记文本修补区域，可能导致越界访问。
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-2025-21866 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2025-21866 其他参考 (8)
同批安全公告 · Linux · 2025-03-12 · 共 26 条
| CVE-2024-58087 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21850 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21855 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21864 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-58089 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21858 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21851 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21844 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21853 | Linux kernel 安全漏洞 | |
| CVE-2024-58088 | Linux kernel 安全漏洞 | |
| CVE-2025-21845 | Linux kernel 安全漏洞 | |
| CVE-2025-21846 | Linux kernel 安全漏洞 | |
| CVE-2025-21848 | Linux kernel 安全漏洞 | |
| CVE-2025-21847 | Linux kernel 安全漏洞 | |
| CVE-2025-21849 | Linux kernel 安全漏洞 | |
| CVE-2025-21852 | Linux kernel 安全漏洞 | |
| CVE-2025-21865 | Linux kernel 安全漏洞 | |
| CVE-2025-21854 | Linux kernel 安全漏洞 | |
| CVE-2025-21856 | Linux kernel 安全漏洞 | |
| CVE-2025-21857 | Linux kernel 安全漏洞 |
显示前 20 条，共 26 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21866
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