CVE-2026-23352— 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，该漏洞源于过早释放引导服务内存，可能导致内存泄漏。
可能的 ATT&CK 技术 1 AI
T1564.004 · NTFS File Attributes影响版本矩阵 21
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 0aed459e8487eb6ebdb4efe8cefe1eafbc704b30< 4a2cb90c538f06c873a187aa743575d48685d7a6 |
affected |
916f676f8dc016103f983c7ec54c18ecdbb6e349< 7131bd1fecc749bc94fb44aae217bbd8a8a85264 |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< 6d8ba221e7aafaa2f284b7d22faee814c28e009d |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< 227688312fece0026fc67a00ba9a0b3611ebe95d |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< 6a25e25279282c5c8ade554c04c6ab9dc7902c64 |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< 399da820ecfe6f4f10c143e5c453d3559a04db9c |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< f9e9cc320854a76a39e7bc92d144554f3a727fad |
affected | ||
916f676f8dc016103f983c7ec54c18ecdbb6e349< 7dcf59422a3b0d20ddda844f856b4a1e0608a326 |
affected | ||
| … +13 条更多 | |||
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一、 漏洞 CVE-2026-23352 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！
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Vulnerability Title
x86/efi: defer freeing of boot services memory
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
x86/efi: defer freeing of boot services memory
efi_free_boot_services() frees memory occupied by EFI_BOOT_SERVICES_CODE
and EFI_BOOT_SERVICES_DATA using memblock_free_late().
There are two issue with that: memblock_free_late() should be used for
memory allocated with memblock_alloc() while the memory reserved with
memblock_reserve() should be freed with free_reserved_area().
More acutely, with CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
efi_free_boot_services() is called before deferred initialization of the
memory map is complete.
Benjamin Herrenschmidt reports that this causes a leak of ~140MB of
RAM on EC2 t3a.nano instances which only have 512MB or RAM.
If the freed memory resides in the areas that memory map for them is
still uninitialized, they won't be actually freed because
memblock_free_late() calls memblock_free_pages() and the latter skips
uninitialized pages.
Using free_reserved_area() at this point is also problematic because
__free_page() accesses the buddy of the freed page and that again might
end up in uninitialized part of the memory map.
Delaying the entire efi_free_boot_services() could be problematic
because in addition to freeing boot services memory it updates
efi.memmap without any synchronization and that's undesirable late in
boot when there is concurrency.
More robust approach is to only defer freeing of the EFI boot services
memory.
Split efi_free_boot_services() in two. First efi_unmap_boot_services()
collects ranges that should be freed into an array then
efi_free_boot_services() later frees them after deferred init is complete.
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，该漏洞源于过早释放引导服务内存，可能导致内存泄漏。
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-2026-23352 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-23352 补丁与修复 (7)
同批安全公告 · Linux · 2026-03-25 · 共 116 条
| CVE-2026-23395 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31788 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23340 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23336 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23350 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23351 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23317 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23306 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23372 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23378 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23383 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23391 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23392 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23393 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23280 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23288 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23364 | 7.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23294 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23356 | Linux kernel 安全漏洞 | |
| CVE-2026-23355 | Linux kernel 安全漏洞 |
显示前 20 条，共 116 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23352
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