CVE-2026-93256— ARM64休眠恢复时未屏蔽DAIF中断
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： arm64: hibernate: 在恢复休眠内核前屏蔽 DAIF 异常标志 arm64 的休眠代码以不严谨的方式管理异常屏蔽，导致在系统恢复（resume）过程中可能出现崩溃和/或警告。 当通过 保存休眠镜像时，所有 DAIF（Debug、Abort、IRQ、FIQ）异常均被屏蔽（通过 实现），并且假设在恢复该休眠镜像时，所有 DAIF 异常仍保持屏蔽状态。 当通过 恢复休眠镜像时，仅屏蔽中断（通过 中的 实现）。当启用伪 NMI（pseudo-NMI）时，DAIF.
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 82869ac57b5d3b550446932c918dbf2caf020c9e< c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec |
affected |
82869ac57b5d3b550446932c918dbf2caf020c9e< 099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< 716c41bd476334afb943308be9ff2142e34461b7 |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< 5370853041a3cb53a125b77528586278f64b378b |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< 290c5b0c9fc0c61fb1c41421ed2394f955206ea0 |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< 012823494e20c3cce622982ebd3fd6971be39ad2 |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< d736ace2c491623c9ab5e73744085e93e9ae3ebe |
affected | ||
82869ac57b5d3b550446932c918dbf2caf020c9e< 684bde100117931f4c51c644a95f42f2dab041bc |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-93256 基础信息
漏洞信息
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Vulnerability Title
arm64: hibernate: mask DAIF before restoring hibernated kernel
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
arm64: hibernate: mask DAIF before restoring hibernated kernel
The arm64 hibernate code manages the exception masking in an unsound
way, leading to potential crashes and/or warnings during resume.
When a hibernation image is saved in `swsusp_arch_suspend()`, all DAIF
exceptions are masked (by virtue of `local_daif_save()`), and the
suspended image is saved assuming that all DAIF exceptions will remain
masked when the image is restored.
When a hibernation image is resumed by `swsusp_arch_resume()`, only
interrupts are masked (by virtue of `local_irq_disable()` in
`resume_target_kernel()`). When pseudo-NMI is enabled the DAIF.IF bits
will be clear, and regardless of pseudo-NMI the DAIF.DA bits will be
clear.
This means that there are two problems:
(1) It is possible to take Debug, SError, or pseudo-NMI exceptions
during the resume process. This is unsafe, as during the resume
process both the old ane new kernels will tranisently be in an
inconsistent state, and swsusp_arch_suspend_exit() won't retain
an executable mapping of any exception vectors.
Any exception taken here will be fatal and silent.
(2) When re-entering the resumed kernel, some DAIF bits will be clear
unexpectedly. This permits Debug, SError, or pseudo-NMI exceptions
to be taken for a short period while the resumed kernel is not yet
in a consistent state.
This is detected by CONFIG_ARM64_DEBUG_PRIORITY_MASKING.
Avoid these issues by masking all DAIF exceptions during resume.
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-2026-93256 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-93256 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-24 · 共 234 条
| CVE-2026-93207 | 9.8 CRITICAL | SUNRPC svcauth_gss_decode_credbody() 存在安全漏洞 |
| CVE-2026-97413 | 9.8 CRITICAL | Linux RDMA/rtrs-srv整数下溢漏洞 |
| CVE-2026-93228 | 9.1 CRITICAL | svcrdma 拒绝段计数为0的写入/回复块漏洞 |
| CVE-2026-93793 | 8.8 HIGH | iwlwifi 驱动 TX_CMD 响应布局验证漏洞 |
| CVE-2026-93799 | 8.8 HIGH | iwlwifi mvm BA窗口状态通知中sta_id验证漏洞 |
| CVE-2026-93790 | 8.8 HIGH | iwlwifi 驱动 BA 通知中 tid_data 越界访问漏洞 |
| CVE-2026-93806 | 8.8 HIGH | wifi: cfg80211 关联响应长度验证漏洞 |
| CVE-2026-97442 | 8.8 HIGH | ath11k无线驱动rx_h_undecap_nwifi无效数据访问漏洞 |
| CVE-2026-97509 | 8.8 HIGH | Thunderbolt 服务期间保持 XDomain 引用漏洞 |
| CVE-2026-97409 | 8.8 HIGH | Linux NVMe-oF目标未初始化前取消请求漏洞 |
| CVE-2026-93280 | 8.8 HIGH | Greybus 音频拓扑边界检查漏洞 |
| CVE-2026-93284 | 8.8 HIGH | drm/pagemap 迁移错误前未解除 dma 映射 |
| CVE-2026-97451 | 8.4 HIGH | ACPICA mid_op 整数溢出漏洞 |
| CVE-2026-97452 | 8.4 HIGH | ACPICA：防止添加无效引用 |
| CVE-2026-97455 | 8.4 HIGH | ACPICA acpi_ds_terminate_control_method 使用后释放漏洞 |
| CVE-2026-97450 | 8.4 HIGH | ACPICA 双重验证处理器对象类型漏洞 |
| CVE-2026-93827 | 8.4 HIGH | virtio-fs 队列设置失败时双重释放漏洞 |
| CVE-2026-97433 | 8.2 HIGH | NVMe 验证 FDP 配置描述符大小 |
| CVE-2026-93221 | 8.1 HIGH | NFS服务端标志位转换为无符号长整型 |
| CVE-2026-93786 | 8.1 HIGH | ksmbd 保持 VFS 继承 POSIX ACL 掩码漏洞 |
显示前 20 条，共 234 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-93256
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