{"api_version":"1","generated_at":"2026-10-01T18:35:09+00:00","cve":"CVE-2026-93256","urls":{"html":"https://cve.report/CVE-2026-93256","api":"https://cve.report/api/cve/CVE-2026-93256.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93256","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93256"},"summary":{"title":"arm64: hibernate: mask DAIF before restoring hibernated kernel","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 16:17:22","updated_at":"2026-09-24 16:17:22"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7","name":"https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2","name":"https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe","name":"https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec","name":"https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0","name":"https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b","name":"https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc","name":"https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","name":"https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93256","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93256","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 716c41bd476334afb943308be9ff2142e34461b7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 5370853041a3cb53a125b77528586278f64b378b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 290c5b0c9fc0c61fb1c41421ed2394f955206ea0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 012823494e20c3cce622982ebd3fd6971be39ad2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e d736ace2c491623c9ab5e73744085e93e9ae3ebe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 82869ac57b5d3b550446932c918dbf2caf020c9e 684bde100117931f4c51c644a95f42f2dab041bc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/kernel/hibernate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"716c41bd476334afb943308be9ff2142e34461b7","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"5370853041a3cb53a125b77528586278f64b378b","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"290c5b0c9fc0c61fb1c41421ed2394f955206ea0","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"012823494e20c3cce622982ebd3fd6971be39ad2","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"d736ace2c491623c9ab5e73744085e93e9ae3ebe","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"},{"lessThan":"684bde100117931f4c51c644a95f42f2dab041bc","status":"affected","version":"82869ac57b5d3b550446932c918dbf2caf020c9e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/kernel/hibernate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-24T15:51:43.080Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec"},{"url":"https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda"},{"url":"https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7"},{"url":"https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b"},{"url":"https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0"},{"url":"https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2"},{"url":"https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe"},{"url":"https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc"}],"title":"arm64: hibernate: mask DAIF before restoring hibernated kernel","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93256","datePublished":"2026-09-24T15:51:43.080Z","dateReserved":"2026-09-17T16:02:15.096Z","dateUpdated":"2026-09-24T15:51:43.080Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 16:17:22","lastModifiedDate":"2026-09-24 16:17:22","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93256","Ordinal":"1","Title":"arm64: hibernate: mask DAIF before restoring hibernated kernel","CVE":"CVE-2026-93256","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93256","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"arm64: hibernate: mask DAIF before restoring hibernated kernel"}]}}}