CVE-2026-46289— 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extract_kvec_to_sg函数中长度计算错误，可能导致缓冲区溢出。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 0185846975339a5c348373aa450a977f5242366b< 3f17500e86d730c76db638bb3ae52f9b5e496c76 |
affected |
0185846975339a5c348373aa450a977f5242366b< e5e22fc9963469e678c4f4bb38d26adcec107f1e |
affected | ||
0185846975339a5c348373aa450a977f5242366b< 8fbba6829057979149d1b37d65690c037f3ddf4d |
affected | ||
0185846975339a5c348373aa450a977f5242366b< 9d38756d0a93b66163554219fa9c3365f40c4035 |
affected | ||
0185846975339a5c348373aa450a977f5242366b< 07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45 |
affected | ||
6.3 |
affected | ||
< 6.3 |
unaffected | ||
6.6.140≤ 6.6.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2026-46289 基础信息
漏洞信息
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Vulnerability Title
lib/scatterlist: fix length calculations in extract_kvec_to_sg
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
lib/scatterlist: fix length calculations in extract_kvec_to_sg
Patch series "Fix bugs in extract_iter_to_sg()", v3.
Fix bugs in the kvec and user variants of extract_iter_to_sg. This series
is growing due to useful remarks made by sashiko.dev.
The main bugs are:
- The length for an sglist entry when extracting from
a kvec can exceed the number of bytes in the page. This
is obviously not intended.
- When extracting a user buffer the sglist is temporarily
used as a scratch buffer for extracted page pointers.
If the sglist already contains some elements this scratch
buffer could overlap with existing entries in the sglist.
The series adds test cases to the kunit_iov_iter test that demonstrate all
of these bugs. Additionally, there is a memory leak fix for the test
itself.
The bugs were orignally introduced into kernel v6.3 where the function
lived in fs/netfs/iterator.c. It was later moved to lib/scatterlist.c in
v6.5. Thus the actual fix is only marked for backports to v6.5+.
This patch (of 5):
When extracting from a kvec to a scatterlist, do not cross page
boundaries. The required length was already calculated but not used as
intended.
Adjust the copied length if the loop runs out of sglist entries without
extracting everything.
While there, return immediately from extract_iter_to_sg if there are no
sglist entries at all.
A subsequent commit will add kunit test cases that demonstrate that the
patch is necessary.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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extract_kvec_to_sg函数中长度计算错误，可能导致缓冲区溢出。
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-2026-46289 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-46289 补丁与修复 (5)
同批安全公告 · Linux · 2026-06-08 · 共 41 条
| CVE-2026-46288 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46307 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46303 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46274 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46275 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46277 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46280 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46311 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46306 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46304 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46299 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46296 | Linux kernel 安全漏洞 | |
| CVE-2026-46314 | Linux kernel 安全漏洞 | |
| CVE-2026-46298 | Linux kernel 安全漏洞 | |
| CVE-2026-46301 | Linux kernel 安全漏洞 | |
| CVE-2026-46302 | Linux kernel 安全漏洞 | |
| CVE-2026-46305 | Linux kernel 安全漏洞 | |
| CVE-2026-46308 | Linux kernel 安全漏洞 | |
| CVE-2026-46309 | Linux kernel 安全漏洞 | |
| CVE-2026-46310 | Linux kernel 安全漏洞 |
显示前 20 条，共 41 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-46289
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