CVE-2026-64130— 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基金会开源的一款操作系统内核。 Linux kernel 6.18之前版本存在安全漏洞，该漏洞源于初始化巨大零页时标签初始化不当，可能导致内存标签泄露。
可能的 ATT&CK 技术 1 AI
T1078 · Valid Accounts影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | adfb6609c6809e107ded9a1cd46f519c882e64ea< 738d18f1da3513d17b6f7bf30146cc4ac2480ffd |
affected |
adfb6609c6809e107ded9a1cd46f519c882e64ea< 2f2aec5120b93a8f8b52dc50cdc60dbb8aec72f6 |
affected | ||
adfb6609c6809e107ded9a1cd46f519c882e64ea< 6a288a4ddb4a994490505ab5f41c445f8e6b6467 |
affected | ||
6.18 |
affected | ||
< 6.18 |
unaffected | ||
6.18.34≤ 6.18.* |
unaffected | ||
7.0.11≤ 7.0.* |
unaffected | ||
7.1≤ * |
unaffected |
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一、 漏洞 CVE-2026-64130 基础信息
漏洞信息
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Vulnerability Title
mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free
__GFP_ZEROTAGS semantics are currently a bit weird, but effectively this
flag is only ever set alongside __GFP_ZERO and __GFP_SKIP_KASAN.
If we run with init_on_free, we will zero out pages during
__free_pages_prepare(), to skip zeroing on the allocation path.
However, when allocating with __GFP_ZEROTAG set, post_alloc_hook() will
consequently not only skip clearing page content, but also skip clearing
tag memory.
Not clearing tags through __GFP_ZEROTAGS is irrelevant for most pages that
will get mapped to user space through set_pte_at() later: set_pte_at() and
friends will detect that the tags have not been initialized yet
(PG_mte_tagged not set), and initialize them.
However, for the huge zero folio, which will be mapped through a PMD
marked as special, this initialization will not be performed, ending up
exposing whatever tags were still set for the pages.
The docs (Documentation/arch/arm64/memory-tagging-extension.rst) state
that allocation tags are set to 0 when a page is first mapped to user
space. That no longer holds with the huge zero folio when init_on_free is
enabled.
Fix it by decoupling __GFP_ZEROTAGS from __GFP_ZERO, passing to
tag_clear_highpages() whether we want to also clear page content.
Invert the meaning of the tag_clear_highpages() return value to have
clearer semantics.
Reproduced with the huge zero folio by modifying the check_buffer_fill
arm64/mte selftest to use a 2 MiB area, after making sure that pages have
a non-0 tag set when freeing (note that, during boot, we will not actually
initialize tags, but only set KASAN_TAG_KERNEL in the page flags).
$ ./check_buffer_fill
1..20
...
not ok 17 Check initial tags with private mapping, sync error mode and mmap memory
not ok 18 Check initial tags with private mapping, sync error mode and mmap/mprotect memory
...
This code needs more cleanups; we'll tackle that next, like
decoupling __GFP_ZEROTAGS from __GFP_SKIP_KASAN.
[akpm@linux-foundation.org: s/__GPF_ZERO/__GFP_ZERO/, per David]
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基金会开源的一款操作系统内核。 Linux kernel 6.18之前版本存在安全漏洞，该漏洞源于初始化巨大零页时标签初始化不当，可能导致内存标签泄露。
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-2026-64130 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64130 补丁与修复 (3)
同批安全公告 · Linux · 2026-07-19 · 共 429 条
| CVE-2026-63795 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63887 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63994 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64035 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64142 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63993 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53399 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-53398 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63825 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64025 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64033 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63886 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64125 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64091 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63808 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63978 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63979 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64132 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64136 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-63800 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 429 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-64130
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