{"api_version":"1","generated_at":"2026-09-18T18:31:38+00:00","cve":"CVE-2026-90212","urls":{"html":"https://cve.report/CVE-2026-90212","api":"https://cve.report/api/cve/CVE-2026-90212.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90212","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90212"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:16","updated_at":"2026-09-17 17:17:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/829539c4a650544cb8e5e8690f2c2d0aa2c0e298","name":"https://git.kernel.org/stable/c/829539c4a650544cb8e5e8690f2c2d0aa2c0e298","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e98a9d0146372b046d863164025a66ab4488b972","name":"https://git.kernel.org/stable/c/e98a9d0146372b046d863164025a66ab4488b972","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90212","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90212","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5baf582f4c026c25a206ac121bceade926aec74 829539c4a650544cb8e5e8690f2c2d0aa2c0e298 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a5baf582f4c026c25a206ac121bceade926aec74 e98a9d0146372b046d863164025a66ab4488b972 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 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/efi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"829539c4a650544cb8e5e8690f2c2d0aa2c0e298","status":"affected","version":"a5baf582f4c026c25a206ac121bceade926aec74","versionType":"git"},{"lessThan":"e98a9d0146372b046d863164025a66ab4488b972","status":"affected","version":"a5baf582f4c026c25a206ac121bceade926aec74","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/kernel/efi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","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":"7.2.6","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:07:26.104Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/829539c4a650544cb8e5e8690f2c2d0aa2c0e298"},{"url":"https://git.kernel.org/stable/c/e98a9d0146372b046d863164025a66ab4488b972"}],"title":"arm64/efi: Avoid voluntary preemption with efi_mm installed","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90212","datePublished":"2026-09-17T16:07:26.104Z","dateReserved":"2026-09-11T19:38:34.793Z","dateUpdated":"2026-09-17T16:07:26.104Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:16","lastModifiedDate":"2026-09-17 17:17:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90212","Ordinal":"1","Title":"arm64/efi: Avoid voluntary preemption with efi_mm installed","CVE":"CVE-2026-90212","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90212","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"arm64/efi: Avoid voluntary preemption with efi_mm installed"}]}}}