{"id":"CVE-2026-90212","revision":"2ffe6e4108a34d20a683318c39520f7d","records":[{"revision":"2ffe6e4108a34d20a683318c39520f7d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90212","aliases":[],"title":"arm64/efi: Avoid voluntary preemption with efi_mm installed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64/efi: Avoid voluntary preemption with efi_mm installed\n\nGus reports a bad kernel memory access when using software PAN\n(CONFIG_ARM64_SW_TTBR0_PAN=y) on a machine with support for EFI runtime\nservices:\n\n  Unable to handle kernel access to user memory outside uaccess routines\n    at virtual address 00000000f322ff30\n  Mem abort info:\n    ESR = 0x0000000096000004\n    FSC = 0x04: level 0 translation fault\n  Internal error: Oops: 0000000096000004 [#1]  SMP\n  Workqueue: efi_rts_wq efi_call_rts\n  pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : efi_call_rts+0xd8/0x288\n  Call trace:\n   efi_call_rts+0xd8/0x288 (P)\n   process_one_work+0x178/0x4f8\n   worker_thread+0x194/0x328\n\nThis is because the fpsimd context management code called from\n__efi_fpsimd_begin() can preempt voluntarily, returning later to the EFI\ncode with an incorrect value for TTBR0_EL1 thanks to the deferred mm\nswitching used by the software PAN implementation.\n\nSince EFI runtime services cannot preempt voluntarily and because the\nfpsimd switching code does not rely on the TTBR0_EL1 mappings, simply\nreorder the fpsimd switch so that it occurs before we change the\npage-table.","state":0,"publishedAt":"2026-09-17T16:07:26.104+00:00","modifiedAt":"2026-10-19T08:59:48.329+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/efi.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a5baf582f4c026c25a206ac121bceade926aec74\",\n                            \"lessThan\": \"829539c4a650544cb8e5e8690f2c2d0aa2c0e298\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a5baf582f4c026c25a206ac121bceade926aec74\",\n                            \"lessThan\": \"e98a9d0146372b046d863164025a66ab4488b972\",\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/efi.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.19\",\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/829539c4a650544cb8e5e8690f2c2d0aa2c0e298","https://git.kernel.org/stable/c/e98a9d0146372b046d863164025a66ab4488b972"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90212","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90212","identifiers":["CVE-2026-90212"]},"retained":false,"historicalAffected":[]}],"coverage":[]}