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CVE-2026-93256— arm64: hibernate: mask DAIF before restoring hibernated kernel

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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.

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
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 more rows
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I. Basic Information for CVE-2026-93256

Vulnerability Information
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Vulnerability Title
arm64: hibernate: mask DAIF before restoring hibernated kernel
Source: 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 82869ac57b5d3b550446932c918dbf2caf020c9e ~ c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-93256

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III. Intelligence Information for CVE-2026-93256

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Patches & Fixes for CVE-2026-93256 (8)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-93256

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