CVE-2026-43187— 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xfs中属性叶节点freemap条目未正确清理，可能导致freemap大小下溢和重叠。
可能的 ATT&CK 技术 1 AI
T1030 · Data Transfer Size Limits影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f3c0d1fc1eadbb4adbee5ab7757d41d35f48325b |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< aa9083d97e2157da3c6fb45ddb1a97af7f188f7f |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a631899025d47ea1aa6464d76db5b4d3b6d196fd |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ffaf5c99d0f862db021fb1af8b813c1416b1beb2 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e1b8c6452ee99a30e188a88f3f3f804fb1c6004a |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f31a8334e1c54b126fcecf98645a49b6bc5ad399 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 479b05fc3ee272090f671b06a41f3da8aa78eece |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6f13c1d2a6271c2e73226864a0e83de2770b6f34 |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-43187 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！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
xfs: delete attr leaf freemap entries when empty
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
xfs: delete attr leaf freemap entries when empty
Back in commit 2a2b5932db6758 ("xfs: fix attr leaf header freemap.size
underflow"), Brian Foster observed that it's possible for a small
freemap at the end of the end of the xattr entries array to experience
a size underflow when subtracting the space consumed by an expansion of
the entries array. There are only three freemap entries, which means
that it is not a complete index of all free space in the leaf block.
This code can leave behind a zero-length freemap entry with a nonzero
base. Subsequent setxattr operations can increase the base up to the
point that it overlaps with another freemap entry. This isn't in and of
itself a problem because the code in _leaf_add that finds free space
ignores any freemap entry with zero size.
However, there's another bug in the freemap update code in _leaf_add,
which is that it fails to update a freemap entry that begins midway
through the xattr entry that was just appended to the array. That can
result in the freemap containing two entries with the same base but
different sizes (0 for the "pushed-up" entry, nonzero for the entry
that's actually tracking free space). A subsequent _leaf_add can then
allocate xattr namevalue entries on top of the entries array, leading to
data loss. But fixing that is for later.
For now, eliminate the possibility of confusion by zeroing out the base
of any freemap entry that has zero size. Because the freemap is not
intended to be a complete index of free space, a subsequent failure to
find any free space for a new xattr will trigger block compaction, which
regenerates the freemap.
It looks like this bug has been in the codebase for quite a long time.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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xfs中属性叶节点freemap条目未正确清理，可能导致freemap大小下溢和重叠。
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-2026-43187 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-43187 的情报信息
请登录查看更多情报信息。
CVE-2026-43187 补丁与修复 (8)
同批安全公告 · Linux · 2026-05-06 · 共 224 条
| CVE-2026-43208 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43198 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43125 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43186 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43185 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43114 | 9.4 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43197 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43117 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43083 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-43110 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43239 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43158 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43232 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43283 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43172 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43176 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43112 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43249 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43215 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-43113 | 8.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 224 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-43187
暂无评论