CVE-2026-98723— Linux nvmet 主机 ID 复制逻辑漏洞
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： nvmet：在创建 PR（持久性预留）的 pc_refs 之前，将 hostid 复制到 ctrl 中。 提交 6202783184bf（"nvmet: 改进 nvmet_alloc_ctrl() 接口和实现"）在 nvmet_alloc_ctrl() 函数末尾附近添加了第二次对 args->hostid 的 uuid_copy() 调用；而提交 7b658153f1b8（"nvmet: 移除重复的 uuid_copy"）则移除了原本位于 nvmet_ctrl_init
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7b658153f1b8a79ed98980f2fef7b92a66aeb9cd< d3d6d7efdacc08616d23b3ac42272a494951dc0f |
affected |
7b658153f1b8a79ed98980f2fef7b92a66aeb9cd< 23194531595c5d1d4454e3a607b0c8fc0c4e8695 |
affected | ||
7b658153f1b8a79ed98980f2fef7b92a66aeb9cd< 5211fed41d7ec90e9ab7239dc4bffffe4d0b2b62 |
affected | ||
6.15 |
affected | ||
< 6.15 |
unaffected | ||
6.18.56≤ 6.18.* |
unaffected | ||
7.2.10≤ 7.2.* |
unaffected | ||
7.3≤ * |
unaffected |
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一、 漏洞 CVE-2026-98723 基础信息
漏洞信息
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Vulnerability Title
nvmet: copy the hostid into the ctrl before creating PR pc_refs
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nvmet: copy the hostid into the ctrl before creating PR pc_refs
Commit 6202783184bf ("nvmet: Improve nvmet_alloc_ctrl() interface and
implementation") added a second uuid_copy() of args->hostid near the end
of nvmet_alloc_ctrl(), and commit 7b658153f1b8 ("nvmet: Remove duplicate
uuid_copy") removed the original copy that sat before
nvmet_ctrl_init_pr() instead of the new one.
Since then nvmet_ctrl_init_pr() snapshots ctrl->hostid into the
per-controller per-namespace reservation refs while the uuid_copy()
from the connect data runs later, after the controller is published.
The ctrl is allocated with kzalloc(), so every pc_ref created on this
path stores the nil UUID.
pc_ref->hostid has a single consumer: nvmet_pr_set_ctrl_to_abort()
matches it against the preempted registrant's hostid to kill and drain
the victim's in-flight I/O for Preempt and Abort. The match can never
hit with the nil UUID, so whenever a namespace with reservations
enabled exists before a host connects, which includes every reconnect,
Preempt and Abort silently degrades into a plain Preempt: the
preempting host sees success while the victim's in-flight I/O is still
in the air.
Copy the hostid where the rest of the connect data is consumed, before
the controller is published and before nvmet_ctrl_init_pr() takes its
snapshot.
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-2026-98723 的公开POC
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|---|
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CVE-2026-98723 补丁与修复 (3)
同批安全公告 · Linux · 2026-10-18 · 共 435 条
| CVE-2026-98719 | KVM SEV 释放"have run CPUs"掩码指针空指针漏洞 | |
| CVE-2026-98733 | Linux 蓝牙 ISO 分组队列序列化漏洞 | |
| CVE-2026-98732 | btintel 缓冲区越界读取漏洞 | |
| CVE-2026-98731 | btintel_pcie 蓝牙驱动 plen 溢出漏洞 | |
| CVE-2026-98730 | 蓝牙 btintel_pcie 驱动拒绝超大 TX 数据包 | |
| CVE-2026-98729 | Linux 内核 x86/mm AMD F15h 大页映射漏洞 | |
| CVE-2026-98728 | TPM 2.0 tpm2_get_random 边界检查漏洞 | |
| CVE-2026-98727 | nvme-multipath 越界访问漏洞 | |
| CVE-2026-98726 | nvme-multipath 任意版本 ANA 日志越界漏洞 | |
| CVE-2026-98725 | nvmet-auth 越界写入漏洞 | |
| CVE-2026-98724 | nvmet-pci-epf 拒绝过短 SGL 段漏洞 | |
| CVE-2026-98722 | Linux 内核 mtd 块设备模块除零漏洞 | |
| CVE-2026-98721 | Cadence rawnand 驱动程序竞争条件漏洞 | |
| CVE-2026-98720 | KVM nVMX 远程代码执行漏洞 | |
| CVE-2026-98707 | mac80211 无线驱动拒绝服务漏洞 | |
| CVE-2026-98711 | Linux内核 cw1200 驱动 TX 填充越界读取漏洞 | |
| CVE-2026-98710 | Linux 内核 iwlegacy 驱动 3945 释放后使用漏洞 | |
| CVE-2026-98709 | mac80211 无线驱动资源预留计数逻辑漏洞 | |
| CVE-2026-98712 | KVM arm64 vgic 整数溢出漏洞 | |
| CVE-2026-98708 | mac80211 无线驱动拒绝服务漏洞 |
显示前 20 条，共 435 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98723
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