[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2022-48943":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T02:53:27.892Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":18,"aliases":19,"duplicate_of":9,"upstream":20,"downstream":21,"duplicates":74,"related":75,"reserved_at":9,"published_at":84,"modified_at":85,"state":86,"summary":87,"references_raw":96,"kevs":115,"epss":116,"epss_history":119,"metrics":385,"affected":391},"CVE-2022-48943","In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/mmu: make apf token non-zero to fix bug\n\nIn current async pagefault logic, when a page is ready, KVM relies on\nkvm_arch_can_dequeue_async_page_present() to determine whether to deliver\na READY event to the Guest. This function test token value of struct\nkvm_vcpu_pv_apf_data, which must be reset to zero by Guest kernel when a\nREADY event is finished by Guest. If value is zero meaning that a READY\nevent is done, so the KVM can deliver another.\nBut the kvm_arch_setup_async_pf() may produce a valid token with zero\nvalue, which is confused with previous mention and may lead the loss of\nthis READY event.\n\nThis bug may cause task blocked forever in Guest:\n INFO: task stress:7532 blocked for more than 1254 seconds.\n       Not tainted 5.10.0 #16\n \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n task:stress          state:D stack:    0 pid: 7532 ppid:  1409\n flags:0x00000080\n Call Trace:\n  __schedule+0x1e7/0x650\n  schedule+0x46/0xb0\n  kvm_async_pf_task_wait_schedule+0xad/0xe0\n  ? exit_to_user_mode_prepare+0x60/0x70\n  __kvm_handle_async_pf+0x4f/0xb0\n  ? asm_exc_page_fault+0x8/0x30\n  exc_page_fault+0x6f/0x110\n  ? asm_exc_page_fault+0x8/0x30\n  asm_exc_page_fault+0x1e/0x30\n RIP: 0033:0x402d00\n RSP: 002b:00007ffd31912500 EFLAGS: 00010206\n RAX: 0000000000071000 RBX: ffffffffffffffff RCX: 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