CVE-2026-68187— 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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于transfer_args_to_stack()函数中无符号循环计数器回绕，可能导致内存访问越界和内核崩溃。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a9eb5c4949008034909bc34ecfa0843ecc1d0ab3 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 67cf5cdad823afb0530d6d0341fbf4ca07e93a09 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 66e20942890a383eb39b2009a2ceb4c2ebec37ef |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c62bb00caba66e01fb578d5f0302f247dc64930a |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< dfc2a00742af4cb7251c1a8fbce4fbae3cc0de4e |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2bc6bf70d41055377f390d06f0f3521deb62fd3b |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 55fa2c7f2b15583d1a2fe1b5abcc24377359339f |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 16cc4f5c1c4b9e45eca7f7deefa5410a292db599 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-68187 基础信息
漏洞信息
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Vulnerability Title
exec: fix unsigned loop counter wrap in transfer_args_to_stack()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
exec: fix unsigned loop counter wrap in transfer_args_to_stack()
The stop value is derived from bprm->p >> PAGE_SHIFT. The index variable
is an unsigned long. If bprm->p drops below PAGE_SIZE and stop becomes
zero the loop condition index >= stop is always true.
After the index == 0 iteration the decrement wraps to ULONG_MAX and
bprm->page[ULONG_MAX] reads sizeof(void *) bytes in front of the array.
The pointer has wrapped to -1. That garbage pointer is then passed to
kmap_local_page() and PAGE_SIZE bytes are copied from wherever that
lands into the stack of the process being created. And the loop doesn't
terminate either...
Getting there only requires bprm->p < PAGE_SIZE. On !MMU
bprm_set_stack_limit() and bprm_hit_stack_limit() are empty. So the only
constraint on how far bprm->p is pushed down is valid_arg_len(), i.e.
that each individual string still fits in what is left.
bprm->p starts at PAGE_SIZE * MAX_ARG_PAGES - sizeof(void *) so a
single argument or environment string of a little over 31 pages leaves
it in the first page:
Oops - load access fault [#1]
CPU: 0 UID: 0 PID: 1 Comm: victim Not tainted 7.2.0-rc4 #1
epc : __memcpy+0xd4/0xf8
ra : transfer_args_to_stack+0xaa/0xae
s4 : ffffffffffffffff s2 : 0000000000000000
a1 : ffffffdc98000000 a2 : 0000000000001000
status: 0000000a00001880 badaddr: ffffffdc98000000 cause: 0000000000000005
[<801a5324>] __memcpy+0xd4/0xf8
[<800d5f6a>] load_flat_binary+0x43a/0x65e
[<800a2de4>] bprm_execve+0x1d4/0x316
[<800a351a>] do_execveat_common+0x12e/0x138
[<800a3d44>] __riscv_sys_execve+0x38/0x4e
Kernel panic - not syncing: Fatal exception in interrupt
This is an arcane bug but we should still fix it.
Count down from MAX_ARG_PAGES so the loop ends when index reaches stop,
stop == 0 included. The iterations performed are unchanged for every
other value of stop.
Only CONFIG_MMU=n builds are affected, transfer_args_to_stack() is used
by binfmt_flat and binfmt_elf_fdpic on nommu only.
The loop predates git history. commit 7e7ec6a93434
("elf_fdpic_transfer_args_to_stack(): make it generic") only moved it
from binfmt_elf_fdpic.c into fs/exec.c and narrowed the copy to the used
part of the first page. The condition and the decrement are unchanged
from 2.6.12-rc2.
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基金会开源的一个操作系统内核。 Linux kernel 2.6.12版本存在安全漏洞，该漏洞源于transfer_args_to_stack()函数中无符号循环计数器回绕，可能导致内存访问越界和内核崩溃。
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-2026-68187 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-68187 补丁与修复 (7)
同批安全公告 · Linux · 2026-08-10 · 共 344 条
| CVE-2026-68159 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68381 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68385 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68388 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68117 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68170 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68161 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68123 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68160 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68127 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68144 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68137 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68302 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68300 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68426 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68136 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68154 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68158 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68156 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-68124 | 9.6 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 344 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-68187
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