CVE-2026-22980— 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v4_end_grace缺少锁定，可能导致内存被释放后访问。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< ca97360860eb02e3ae4ba42c19b439a0fcecbf06 |
affected |
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< e8bfa2401d4c51eca6e48e9b33c798828ca9df61 |
affected | ||
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< 34eb22836e0cdba093baac66599d68c4cd245a9d |
affected | ||
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< 06600719d0f7a723811c45e4d51f5b742f345309 |
affected | ||
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< ba4811c8b433bfa681729ca42cc62b6034f223b0 |
affected | ||
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< 53f07d095e7e680c5e4569a55a019f2c0348cdc6 |
affected | ||
7f5ef2e900d9462bf9cffaf6bb246ed87a20a6d6< 2857bd59feb63fcf40fe4baf55401baea6b4feb4 |
affected | ||
3.18 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2026-22980 基础信息
漏洞信息
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Vulnerability Title
nfsd: provide locking for v4_end_grace
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nfsd: provide locking for v4_end_grace
Writing to v4_end_grace can race with server shutdown and result in
memory being accessed after it was freed - reclaim_str_hashtbl in
particularly.
We cannot hold nfsd_mutex across the nfsd4_end_grace() call as that is
held while client_tracking_op->init() is called and that can wait for
an upcall to nfsdcltrack which can write to v4_end_grace, resulting in a
deadlock.
nfsd4_end_grace() is also called by the landromat work queue and this
doesn't require locking as server shutdown will stop the work and wait
for it before freeing anything that nfsd4_end_grace() might access.
However, we must be sure that writing to v4_end_grace doesn't restart
the work item after shutdown has already waited for it. For this we
add a new flag protected with nn->client_lock. It is set only while it
is safe to make client tracking calls, and v4_end_grace only schedules
work while the flag is set with the spinlock held.
So this patch adds a nfsd_net field "client_tracking_active" which is
set as described. Another field "grace_end_forced", is set when
v4_end_grace is written. After this is set, and providing
client_tracking_active is set, the laundromat is scheduled.
This "grace_end_forced" field bypasses other checks for whether the
grace period has finished.
This resolves a race which can result in use-after-free.
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v4_end_grace缺少锁定，可能导致内存被释放后访问。
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-2026-22980 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-01-23 · 共 34 条
| CVE-2026-22984 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71159 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71145 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71155 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22988 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71158 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71146 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71150 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22992 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22991 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22990 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71161 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22983 | Linux kernel 安全漏洞 | |
| CVE-2026-22995 | Linux kernel 安全漏洞 | |
| CVE-2026-22985 | Linux kernel 安全漏洞 | |
| CVE-2026-22986 | Linux kernel 安全漏洞 | |
| CVE-2026-22987 | Linux kernel 安全漏洞 | |
| CVE-2026-22989 | Linux kernel 安全漏洞 | |
| CVE-2026-22993 | Linux kernel 安全漏洞 | |
| CVE-2026-22994 | Linux kernel 安全漏洞 |
显示前 20 条，共 34 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-22980
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