CVE-2026-90400— Mercurial 1.0 同步数据不一致漏洞
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。
在 Linux 内核中，以下漏洞已得到修复： md：在启动同步之前重新检查备用盘（spare）的变化 和 会修改阵列的 rdev 配置。这些操作只有在阵列处于挂起（suspended）状态下才是安全的。 在获取 之前，会检查是否需要改变备用盘配置。然而，在获取互斥锁之前，rdev 的状态可能会发生变化，因此最初的检查可能会失效（stale）。在这种情况下， 可能会在普通 I/O 仍在访问这些 rdev 时移除或替换它们。 该竞态条件可能按以下时序发生： 在这种情况下， 被传入了一个 NULL 指针，导致在尝试递减
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | bc08041b32abe6c9824f78735bac22018eabfc06< c3777d16bc3335c0ac4bdad0551c80d38c5d94cc |
affected |
bc08041b32abe6c9824f78735bac22018eabfc06< e5ac7ab78467b064f1da8b0f3042a63595fafcfd |
affected | ||
bc08041b32abe6c9824f78735bac22018eabfc06< 81b39df5d701976cf20e52f33106c1fc1603b4cb |
affected | ||
bc08041b32abe6c9824f78735bac22018eabfc06< c7d34d17ea43ebc86b45d439ebb435e11ca44bca |
affected | ||
6.7 |
affected | ||
< 6.7 |
unaffected | ||
6.12.110≤ 6.12.* |
unaffected | ||
6.18.52≤ 6.18.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-90400 基础信息
漏洞信息
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Vulnerability Title
md: recheck spare changes before starting sync
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
md: recheck spare changes before starting sync
remove_spares() and remove_and_add_spares() modify the array's rdev
configuration. These operations are only safe after the array has been
suspended.
md_start_sync() checks whether spare configuration changes are needed
before taking reconfig_mutex. However, the rdev state can change before
the mutex is acquired, so the initial check can become stale. In that
case, md_choose_sync_action() may remove or replace rdevs while normal
I/O is still accessing them.
The race can occur as follows:
raid10d Worker Normal IO
____________ _______________________ ______________________
raid10_write_request()
wait_blocked_dev()
set Blocked
set Faulty
Skip Faulty rdev
rrdev->nr_pending++
.repl_bio = bio
removeable_rdev = false .
array not suspended .
lock mddev goto err_handle
lock mddev (wait)
.
update sb .
clear Blocked .
.
unlock mddev .
lock mddev (acquires)
remove_spares()
removeable_rdev = true
raid10_remove_disk()
rdev = replacement
replacement = NULL
rdev_dec_pending(NULL)
unlock mddev (NULL)->nr_pending--
In this case, rdev_dec_pending() is called with a NULL pointer,
resulting in a NULL pointer dereference when attempting to decrement
nr_pending.
Fix this by suspending the array when spare configuration changes are
needed, including for non-read-write arrays, and checking again after
taking reconfig_mutex. If the array was not already suspended and a
change is now needed, release the mutex, suspend the array, and
reacquire the mutex before continuing.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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-2026-90400 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90400 补丁与修复 (4)
同批安全公告 · Linux · 2026-09-17 · 共 600 条
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| CVE-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4客户端分配失败回调处理漏洞 |
| CVE-2026-90235 | 9.8 CRITICAL | 内核sunrpc xprtsock并发读取修复 |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1 解码前未清空调用列表 |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert 登录PDU数据长度校验漏洞 |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90255 | 8.8 HIGH | Linux内核 Bluetooth 漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90357 | 8.8 HIGH | mt76驱动MT7915无线局域网远程拒绝服务漏洞 |
| CVE-2026-90367 | 8.8 HIGH | Linux内核MT7996驱动死锁漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
| CVE-2026-90371 | 8.8 HIGH | mt76 无线驱动 RXDMAD_C 竞态修复 |
| CVE-2026-93189 | 8.8 HIGH | Linux HID核心使用已释放内存漏洞 |
| CVE-2026-90425 | 8.8 HIGH | Linux内核 5.x 内核漏洞 |
| CVE-2026-90240 | 8.8 HIGH | Linux内核 IOMMU 别名拆除时刷新缓存错误 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-90286 | 8.8 HIGH | AMDGPU GFX6 计算队列PFP使用漏洞 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90400
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