CVE-2026-80530— Linux XFS 子系统交换范围去重标志修复
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。
以下是该漏洞描述信息的中文翻译： 在 Linux 内核中，以下漏洞已得到修复： xfs：修复与 INO1_WRITTEN 相关的交换范围 reflink 标志清除问题 当交换两个完整文件的范围时， 函数可以将 reflink 内核对标志从当前拥有该标志的文件移动到另一个文件，前提是只有一侧被标记。这一操作基于一个假设：即文件内容（因此所有共享的扩展）都会被交换。 然而，当设置了 时，该假设并不成立。 函数可以跳过来自 file1 的空洞（hole）和未写（unwritten）映射，因此即使之前的标志交换决策考虑了所
可能的 ATT&CK 技术 1 AI
T1201 · Password Policy Discovery影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 966ceafc7a437105ecfe1cadb3747b2965a260ca< 2efbd8890b53f4756fdc7b0ef346fa514ffb7d66 |
affected |
966ceafc7a437105ecfe1cadb3747b2965a260ca< 0f27b22343b63e10773e6781344640c2c753eec3 |
affected | ||
966ceafc7a437105ecfe1cadb3747b2965a260ca< 03c9c9116e6da641424681f705698d7f5e2128e0 |
affected | ||
966ceafc7a437105ecfe1cadb3747b2965a260ca< b2d5a81dae385333f9734910277fbf94c78bd17f |
affected | ||
6.10 |
affected | ||
< 6.10 |
unaffected | ||
6.12.105≤ 6.12.* |
unaffected | ||
6.18.46≤ 6.18.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-80530 基础信息
漏洞信息
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Vulnerability Title
xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN
When exchanging two full-file ranges, xmi_can_exchange_reflink_flags()
can move the reflink inode flag from the file that currently has it to
the other file, as long as exactly one side is marked. This assumes
that the file contents, and therefore all shared extents, are exchanged.
That assumption is not true when XFS_EXCHMAPS_INO1_WRITTEN is set.
xfs_exchmaps_can_skip_mapping() can skip hole and unwritten mappings
from file1, so an exchange can complete without moving every mapping
that the earlier flag-swap decision accounted for. In that case the
post-operation cleanup can clear the reflink flag from an inode that
still owns shared written extents. Later writes then take the
non-reflink write path and may update blocks that should still have
been protected by CoW, which shows up as data corruption between
reflink-related files.
Fix this by disabling the reflink flag exchange whenever
XFS_EXCHMAPS_INO1_WRITTEN is requested. The contents exchange can still
proceed; the conservative outcome is that both inodes keep the reflink
flag. The regular reflink flag cleanup path can drop the extra flag
later once the inode no longer has shared extents.
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:N
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-80530 的公开POC
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CVE-2026-80530 补丁与修复 (3)
CVE-2026-80530 其他参考 (1)
同批安全公告 · Linux · 2026-08-26 · 共 92 条
| CVE-2026-80561 | 9.8 CRITICAL | libceph 多个不安全解码远程代码执行漏洞 |
| CVE-2026-80587 | 9.8 CRITICAL | Linux内核 MPTCP 缓冲区溢出漏洞 |
| CVE-2026-74737 | 9.8 CRITICAL | TI AM65 CPSW 驱动端口ID提取错误 |
| CVE-2026-80589 | 9.8 CRITICAL | 磁盘块：释放未添加磁盘时停止超时定时器 |
| CVE-2026-80558 | 9.8 CRITICAL | Ceph libceph 模块 OSID 索引缺陷 |
| CVE-2026-74743 | 9.8 CRITICAL | macvlan 继承底层设备头部尾部空间 |
| CVE-2026-74744 | 9.8 CRITICAL | Linux内核ipvlan模块继承headroom/tailroom |
| CVE-2026-80528 | 9.8 CRITICAL | Ceph 文件回收竞态漏洞 |
| CVE-2026-80557 | 9.8 CRITICAL | libceph 2.0 越界读取漏洞 |
| CVE-2026-74752 | 9.8 CRITICAL | SCTP协议Cookie AUTH状态校验前使用漏洞 |
| CVE-2026-80586 | 9.8 CRITICAL | Linux内核 MPTCP 模块异常尺寸处理缺陷 |
| CVE-2026-80519 | 9.8 CRITICAL | OpenVPN 加密回调清理漏洞 |
| CVE-2026-74746 | 9.8 CRITICAL | Netfilter 流表 GC 可见元组发布顺序漏洞 |
| CVE-2026-74751 | 9.4 CRITICAL | RISC-V ZBB strnlen越界读取 |
| CVE-2026-80585 | 9.4 CRITICAL | Linux 内核 MPTCP 快开子流标记错误 |
| CVE-2026-80554 | 9.3 CRITICAL | Linux s390/vfio_ccw 通道程序段数限制 |
| CVE-2026-80551 | 9.3 CRITICAL | s390/vfio_ccw: 确保首个IDAW保持不变 |
| CVE-2026-80553 | 8.8 HIGH | s390/vfio_ccw 队列取消机制 |
| CVE-2026-80552 | 8.8 HIGH | s390/vfio_ccw 缓冲区溢出漏洞 |
| CVE-2026-80576 | 8.8 HIGH | AMD GPU 驱动拒绝超大IB |
显示前 20 条，共 92 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80530
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