{"schema":"threatline.record/2","record":{"id":"CVE-2026-93256","aliases":[],"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"716c41bd476334afb943308be9ff2142e34461b7","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"5370853041a3cb53a125b77528586278f64b378b","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"290c5b0c9fc0c61fb1c41421ed2394f955206ea0","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"012823494e20c3cce622982ebd3fd6971be39ad2","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"d736ace2c491623c9ab5e73744085e93e9ae3ebe","status":"affected","versionType":"git"},{"version":"82869ac57b5d3b550446932c918dbf2caf020c9e","lessThan":"684bde100117931f4c51c644a95f42f2dab041bc","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.7","status":"affected"},{"version":"0","lessThan":"4.7","status":"unaffected","versionType":"semver"},{"version":"5.10.270","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.221","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"716c41bd476334afb943308be9ff2142e34461b7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5370853041a3cb53a125b77528586278f64b378b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"290c5b0c9fc0c61fb1c41421ed2394f955206ea0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"012823494e20c3cce622982ebd3fd6971be39ad2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","source_modified_at":"2026-10-19T09:08:09.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"684bde100117931f4c51c644a95f42f2dab041bc","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00211,"percentile":0.10753,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:51:43.080Z","modified_at":"2026-10-19T09:08:09.709Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:08:09.709Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93256","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:08:09.709Z","content_hash":"72f9aa4ec3962232b63db1f8bc5910ce299aa81dbe57ebe8c375bbaff855fbbd"}}