{"id":"DEBIAN-CVE-2022-50425","details":"In the Linux kernel, the following vulnerability has been resolved:  x86/fpu: Fix copy_xstate_to_uabi() to copy init states correctly  When an extended state component is not present in fpstate, but in init state, the function copies from init_fpstate via copy_feature().  But, dynamic states are not present in init_fpstate because of all-zeros init states. Then retrieving them from init_fpstate will explode like this:   BUG: kernel NULL pointer dereference, address: 0000000000000000  ...  RIP: 0010:memcpy_erms+0x6/0x10   ? __copy_xstate_to_uabi_buf+0x381/0x870   fpu_copy_guest_fpstate_to_uabi+0x28/0x80   kvm_arch_vcpu_ioctl+0x14c/0x1460 [kvm]   ? __this_cpu_preempt_check+0x13/0x20   ? vmx_vcpu_put+0x2e/0x260 [kvm_intel]   kvm_vcpu_ioctl+0xea/0x6b0 [kvm]   ? kvm_vcpu_ioctl+0xea/0x6b0 [kvm]   ? __fget_light+0xd4/0x130   __x64_sys_ioctl+0xe3/0x910   ? debug_smp_processor_id+0x17/0x20   ? fpregs_assert_state_consistent+0x27/0x50   do_syscall_64+0x3f/0x90   entry_SYSCALL_64_after_hwframe+0x63/0xcd  Adjust the 'mask' to zero out the userspace buffer for the features that are not available both from fpstate and from init_fpstate.  The dynamic features depend on the compacted XSAVE format. Ensure it is enabled before reading XCOMP_BV in init_fpstate.","modified":"2026-08-27T23:04:47.432956795Z","published":"2025-10-01T12:15:33.987Z","upstream":["CVE-2022-50425"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50425"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50425.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50425.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50425.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}