{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "82869ac57b5d3b550446932c918dbf2caf020c9e"
            },
            {
              "fixed": "c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec"
            },
            {
              "fixed": "099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda"
            },
            {
              "fixed": "716c41bd476334afb943308be9ff2142e34461b7"
            },
            {
              "fixed": "5370853041a3cb53a125b77528586278f64b378b"
            },
            {
              "fixed": "290c5b0c9fc0c61fb1c41421ed2394f955206ea0"
            },
            {
              "fixed": "012823494e20c3cce622982ebd3fd6971be39ad2"
            },
            {
              "fixed": "d736ace2c491623c9ab5e73744085e93e9ae3ebe"
            },
            {
              "fixed": "684bde100117931f4c51c644a95f42f2dab041bc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.7.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93256.json"
  },
  "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.",
  "id": "CVE-2026-93256",
  "modified": "2026-09-26T03:31:00.238444865Z",
  "published": "2026-09-24T15:51:43.080Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93256.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93256"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "arm64: hibernate: mask DAIF before restoring hibernated kernel"
}