{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-93256",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-93256"
  ],
  "published": "2026-09-24T15:54:02Z",
  "summary": "arm64: hibernate: mask DAIF before restoring hibernated kernel",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: hibernate: mask DAIF before restoring hibernated kernel\n\nThe arm64 hibernate code manages the exception masking in an unsound\nway, leading to potential crashes and/or warnings during resume.\n\nWhen a hibernation image is saved in `swsusp_arch_suspend()`, all DAIF\nexceptions are masked (by virtue of `local_daif_save()`), and the\nsuspended image is saved assuming that all DAIF exceptions will remain\nmasked when the image is restored.\n\nWhen a hibernation image is resumed by `swsusp_arch_resume()`, only\ninterrupts are masked (by virtue of `local_irq_disable()` in\n`resume_target_kernel()`). When pseudo-NMI is enabled the DAIF.IF bits\nwill be clear, and regardless of pseudo-NMI the DAIF.DA bits will be\nclear.\n\nThis means that there are two problems:\n\n(1) It is possible to take Debug, SError, or pseudo-NMI exceptions\n    during the resume process. This is unsafe, as during the resume\n    process both the old ane new kernels will tranisently be in an\n    inconsistent state, and swsusp_arch_suspend_exit() won't retain\n    an executable mapping of any exception vectors.\n\n    Any exception taken here will be fatal and silent.\n\n(2) When re-entering the resumed kernel, some DAIF bits will be clear\n    unexpectedly. This permits Debug, SError, or pseudo-NMI exceptions\n    to be taken for a short period while the resumed kernel is not yet\n    in a consistent state.\n\n    This is detected by CONFIG_ARM64_DEBUG_PRIORITY_MASKING.\n\nAvoid these issues by masking all DAIF exceptions during resume.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-93256"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-24T15:54:02Z"
  }
}