{"id":"CVE-2026-93256","revision":"fb0cdfc606204d2cb6d81a38f49a04d1","records":[{"revision":"fb0cdfc606204d2cb6d81a38f49a04d1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93256","aliases":[],"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":0,"publishedAt":"2026-09-24T15:51:43.08+00:00","modifiedAt":"2026-10-19T09:08:09.709+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kernel/hibernate.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"716c41bd476334afb943308be9ff2142e34461b7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"5370853041a3cb53a125b77528586278f64b378b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"290c5b0c9fc0c61fb1c41421ed2394f955206ea0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"012823494e20c3cce622982ebd3fd6971be39ad2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"d736ace2c491623c9ab5e73744085e93e9ae3ebe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"82869ac57b5d3b550446932c918dbf2caf020c9e\",\n                            \"lessThan\": \"684bde100117931f4c51c644a95f42f2dab041bc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kernel/hibernate.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec","https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda","https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7","https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b","https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0","https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2","https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe","https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93256","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93256","identifiers":["CVE-2026-93256"]},"retained":false,"historicalAffected":[]}],"coverage":[]}