CVE-2025-21709— 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dup_mmap失败和uprobe注册问题。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d2406291483775ecddaee929231a39c70c08fda2< 74c2471eb891a7dcb3874b21c106cda75f52be30 |
affected |
d2406291483775ecddaee929231a39c70c08fda2< da139948aeda677ac09cc0e7d837f8a314de7d55 |
affected | ||
d2406291483775ecddaee929231a39c70c08fda2< 64c37e134b120fb462fb4a80694bfb8e7be77b14 |
affected | ||
6.8 |
affected | ||
< 6.8 |
unaffected | ||
6.12.83≤ 6.12.* |
unaffected | ||
6.13.2≤ 6.13.* |
unaffected | ||
6.14≤ * |
unaffected |
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一、 漏洞 CVE-2025-21709 基础信息
漏洞信息
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Vulnerability Title
kernel: be more careful about dup_mmap() failures and uprobe registering
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
kernel: be more careful about dup_mmap() failures and uprobe registering
If a memory allocation fails during dup_mmap(), the maple tree can be left
in an unsafe state for other iterators besides the exit path. All the
locks are dropped before the exit_mmap() call (in mm/mmap.c), but the
incomplete mm_struct can be reached through (at least) the rmap finding
the vmas which have a pointer back to the mm_struct.
Up to this point, there have been no issues with being able to find an
mm_struct that was only partially initialised. Syzbot was able to make
the incomplete mm_struct fail with recent forking changes, so it has been
proven unsafe to use the mm_struct that hasn't been initialised, as
referenced in the link below.
Although 8ac662f5da19f ("fork: avoid inappropriate uprobe access to
invalid mm") fixed the uprobe access, it does not completely remove the
race.
This patch sets the MMF_OOM_SKIP to avoid the iteration of the vmas on the
oom side (even though this is extremely unlikely to be selected as an oom
victim in the race window), and sets MMF_UNSTABLE to avoid other potential
users from using a partially initialised mm_struct.
When registering vmas for uprobe, skip the vmas in an mm that is marked
unstable. Modifying a vma in an unstable mm may cause issues if the mm
isn't fully initialised.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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dup_mmap失败和uprobe注册问题。
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-2025-21709 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-21709 补丁与修复 (2)
同批安全公告 · Linux · 2025-02-27 · 共 177 条
| CVE-2025-21748 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21707 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21796 | 9.8 CRITICAL | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21805 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-58006 | 9.6 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-57999 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57997 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57995 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21735 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21710 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-57973 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21760 | 8.1 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21765 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21766 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21762 | 8.1 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2024-54458 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2024-58003 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21801 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21722 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
| CVE-2025-21726 | 7.8 HIGH | Linux kernel 资源管理错误漏洞 |
显示前 20 条，共 177 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21709
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