CVE-2026-80530— 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基金会开源的一个操作系统内核。 Linux kernel 6.10版本至7.2之前版本存在安全漏洞，该漏洞源于XFS在处理exchange-range文件范围交换时，xfs_exchmaps_can_skip_mapping()函数可能跳过空洞和未写入映射，导致reflink inode标志被错误清除，后续写入绕过CoW保护，从而可能导致reflink相关文件间的数据损坏或数据泄露。
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
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基金会开源的一个操作系统内核。 Linux kernel 6.10版本至7.2之前版本存在安全漏洞，该漏洞源于XFS在处理exchange-range文件范围交换时，xfs_exchmaps_can_skip_mapping()函数可能跳过空洞和未写入映射，导致reflink inode标志被错误清除，后续写入绕过CoW保护，从而可能导致reflink相关文件间的数据损坏或数据泄露。
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-2026-80530 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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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 kernel 安全漏洞 |
| 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 | Linux kernel 安全漏洞 |
| 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 | Linux kernel 安全漏洞 |
| CVE-2026-80553 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-80552 | 8.8 HIGH | Linux kernel 安全漏洞 |
| 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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