CVE-2022-50425

{"id": "CVE-2022-50425", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-10-01T12:15:33.987", "references": [{"url": "https://git.kernel.org/stable/c/471f0aa7fa64e23766a1473b32d9ec3f0718895a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6ff29642fd28965a8f8d6d326ac91bf6075f3113", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/fpu: Fix copy_xstate_to_uabi() to copy init states correctly\n\nWhen an extended state component is not present in fpstate, but in init\nstate, the function copies from init_fpstate via copy_feature().\n\nBut, dynamic states are not present in init_fpstate because of all-zeros\ninit states. Then retrieving them from init_fpstate will explode like this:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n ...\n RIP: 0010:memcpy_erms+0x6/0x10\n ? __copy_xstate_to_uabi_buf+0x381/0x870\n fpu_copy_guest_fpstate_to_uabi+0x28/0x80\n kvm_arch_vcpu_ioctl+0x14c/0x1460 [kvm]\n ? __this_cpu_preempt_check+0x13/0x20\n ? vmx_vcpu_put+0x2e/0x260 [kvm_intel]\n kvm_vcpu_ioctl+0xea/0x6b0 [kvm]\n ? kvm_vcpu_ioctl+0xea/0x6b0 [kvm]\n ? __fget_light+0xd4/0x130\n __x64_sys_ioctl+0xe3/0x910\n ? debug_smp_processor_id+0x17/0x20\n ? fpregs_assert_state_consistent+0x27/0x50\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nAdjust the 'mask' to zero out the userspace buffer for the features that\nare not available both from fpstate and from init_fpstate.\n\nThe dynamic features depend on the compacted XSAVE format. Ensure it is\nenabled before reading XCOMP_BV in init_fpstate."}], "lastModified": "2026-01-20T20:14:12.247", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "65D387F0-209C-4EAD-98BA-C4B430A840C9", "versionEndExcluding": "6.0.7", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}