CVE-2025-22090— 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copy_page_range中fork失败时VM_PAT处理不当，可能导致资源泄漏。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2ab640379a0ab4cef746ced1d7e04a0941774bcb< a6623712ba8449876f0b3de9462831523fb851e4 |
affected |
2ab640379a0ab4cef746ced1d7e04a0941774bcb< b07398e8a5da517083f5c3f2daa8f6681b48ab28 |
affected | ||
2ab640379a0ab4cef746ced1d7e04a0941774bcb< 8d6373f83f367dbed316ddeb178130a3a64b5b67 |
affected | ||
2ab640379a0ab4cef746ced1d7e04a0941774bcb< da381c33f3aa6406406c9fdf07b8b0b63e0ce722 |
affected | ||
2ab640379a0ab4cef746ced1d7e04a0941774bcb< de6185b8892d88142ef69768fe4077cbf40109c0 |
affected | ||
2ab640379a0ab4cef746ced1d7e04a0941774bcb< dc84bc2aba85a1508f04a936f9f9a15f64ebfb31 |
affected | ||
2.6.29 |
affected | ||
< 2.6.29 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2025-22090 基础信息
漏洞信息
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Vulnerability Title
x86/mm/pat: Fix VM_PAT handling when fork() fails in copy_page_range()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
x86/mm/pat: Fix VM_PAT handling when fork() fails in copy_page_range()
If track_pfn_copy() fails, we already added the dst VMA to the maple
tree. As fork() fails, we'll cleanup the maple tree, and stumble over
the dst VMA for which we neither performed any reservation nor copied
any page tables.
Consequently untrack_pfn() will see VM_PAT and try obtaining the
PAT information from the page table -- which fails because the page
table was not copied.
The easiest fix would be to simply clear the VM_PAT flag of the dst VMA
if track_pfn_copy() fails. However, the whole thing is about "simply"
clearing the VM_PAT flag is shaky as well: if we passed track_pfn_copy()
and performed a reservation, but copying the page tables fails, we'll
simply clear the VM_PAT flag, not properly undoing the reservation ...
which is also wrong.
So let's fix it properly: set the VM_PAT flag only if the reservation
succeeded (leaving it clear initially), and undo the reservation if
anything goes wrong while copying the page tables: clearing the VM_PAT
flag after undoing the reservation.
Note that any copied page table entries will get zapped when the VMA will
get removed later, after copy_page_range() succeeded; as VM_PAT is not set
then, we won't try cleaning VM_PAT up once more and untrack_pfn() will be
happy. Note that leaving these page tables in place without a reservation
is not a problem, as we are aborting fork(); this process will never run.
A reproducer can trigger this usually at the first try:
https://gitlab.com/davidhildenbrand/scratchspace/-/raw/main/reproducers/pat_fork.c
WARNING: CPU: 26 PID: 11650 at arch/x86/mm/pat/memtype.c:983 get_pat_info+0xf6/0x110
Modules linked in: ...
CPU: 26 UID: 0 PID: 11650 Comm: repro3 Not tainted 6.12.0-rc5+ #92
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014
RIP: 0010:get_pat_info+0xf6/0x110
...
Call Trace:
<TASK>
...
untrack_pfn+0x52/0x110
unmap_single_vma+0xa6/0xe0
unmap_vmas+0x105/0x1f0
exit_mmap+0xf6/0x460
__mmput+0x4b/0x120
copy_process+0x1bf6/0x2aa0
kernel_clone+0xab/0x440
__do_sys_clone+0x66/0x90
do_syscall_64+0x95/0x180
Likely this case was missed in:
d155df53f310 ("x86/mm/pat: clear VM_PAT if copy_p4d_range failed")
... and instead of undoing the reservation we simply cleared the VM_PAT flag.
Keep the documentation of these functions in include/linux/pgtable.h,
one place is more than sufficient -- we should clean that up for the other
functions like track_pfn_remap/untrack_pfn separately.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
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copy_page_range中fork失败时VM_PAT处理不当，可能导致资源泄漏。
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-2025-22090 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-22090 其他参考 (5)
同批安全公告 · Linux · 2025-04-16 · 共 127 条
| CVE-2025-22021 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22088 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22110 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22077 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-22086 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22039 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-23133 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22074 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22118 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22040 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22041 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-58096 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22117 | 8.7 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22108 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22080 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22121 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22038 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22043 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22042 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22049 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 127 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-22090
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