{"cve":"CVE-2023-53319","nvd":{"published":"2025-09-16T17:15:37.947","modified":"2026-06-17T06:44:52.650","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Handle kvm_arm_init failure correctly in finalize_pkvm\n\nCurrently there is no synchronisation between finalize_pkvm() and\nkvm_arm_init() initcalls. The finalize_pkvm() proceeds happily even if\nkvm_arm_init() fails resulting in the following warning on all the CPUs\nand eventually a HYP panic:\n\n  | kvm [1]: IPA Size Limit: 48 bits\n  | kvm [1]: Failed to init hyp memory protection\n  | kvm [1]: error initializing Hyp mode: -22\n  |\n  | <snip>\n  |\n  | WARNING: CPU: 0 PID: 0 at arch/arm64/kvm/pkvm.c:226 _kvm_host_prot_finalize+0x30/0x50\n  | Modules linked in:\n  | CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.4.0 #237\n  | Hardware name: FVP Base RevC (DT)\n  | pstate: 634020c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)\n  | pc : _kvm_host_prot_finalize+0x30/0x50\n  | lr : __flush_smp_call_function_queue+0xd8/0x230\n  |\n  | Call trace:\n  |  _kvm_host_prot_finalize+0x3c/0x50\n  |  on_each_cpu_cond_mask+0x3c/0x6c\n  |  pkvm_drop_host_privileges+0x4c/0x78\n  |  finalize_pkvm+0x3c/0x5c\n  |  do_one_initcall+0xcc/0x240\n  |  do_initcall_level+0x8c/0xac\n  |  do_initcalls+0x54/0x94\n  |  do_basic_setup+0x1c/0x28\n  |  kernel_init_freeable+0x100/0x16c\n  |  kernel_init+0x20/0x1a0\n  |  ret_from_fork+0x10/0x20\n  | Failed to finalize Hyp protection: -22\n  |     dtb=fvp-base-revc.dtb\n  | kvm [95]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:540!\n  | kvm [95]: nVHE call trace:\n  | kvm [95]:  [<ffff800081052984>] __kvm_nvhe_hyp_panic+0xac/0xf8\n  | kvm [95]:  [<ffff800081059644>] __kvm_nvhe_handle_host_mem_abort+0x1a0/0x2ac\n  | kvm [95]:  [<ffff80008105511c>] __kvm_nvhe_handle_trap+0x4c/0x160\n  | kvm [95]:  [<ffff8000810540fc>] __kvm_nvhe___skip_pauth_save+0x4/0x4\n  | kvm [95]: ---[ end nVHE call trace ]---\n  | kvm [95]: Hyp Offset: 0xfffe8db00ffa0000\n  | Kernel panic - not syncing: HYP panic:\n  | PS:a34023c9 PC:0000f250710b973c ESR:00000000f2000800\n  | FAR:ffff000800cb00d0 HPFAR:000000000880cb00 PAR:0000000000000000\n  | VCPU:0000000000000000\n  | CPU: 3 PID: 95 Comm: kworker/u16:2 Tainted: G        W          6.4.0 #237\n  | Hardware name: FVP Base RevC (DT)\n  | Workqueue: rpciod rpc_async_schedule\n  | Call trace:\n  |  dump_backtrace+0xec/0x108\n  |  show_stack+0x18/0x2c\n  |  dump_stack_lvl+0x50/0x68\n  |  dump_stack+0x18/0x24\n  |  panic+0x138/0x33c\n  |  nvhe_hyp_panic_handler+0x100/0x184\n  |  new_slab+0x23c/0x54c\n  |  ___slab_alloc+0x3e4/0x770\n  |  kmem_cache_alloc_node+0x1f0/0x278\n  |  __alloc_skb+0xdc/0x294\n  |  tcp_stream_alloc_skb+0x2c/0xf0\n  |  tcp_sendmsg_locked+0x3d0/0xda4\n  |  tcp_sendmsg+0x38/0x5c\n  |  inet_sendmsg+0x44/0x60\n  |  sock_sendmsg+0x1c/0x34\n  |  xprt_sock_sendmsg+0xdc/0x274\n  |  xs_tcp_send_request+0x1ac/0x28c\n  |  xprt_transmit+0xcc/0x300\n  |  call_transmit+0x78/0x90\n  |  __rpc_execute+0x114/0x3d8\n  |  rpc_async_schedule+0x28/0x48\n  |  process_one_work+0x1d8/0x314\n  |  worker_thread+0x248/0x474\n  |  kthread+0xfc/0x184\n  |  ret_from_fork+0x10/0x20\n  | SMP: stopping secondary CPUs\n  | Kernel Offset: 0x57c5cb460000 from 0xffff800080000000\n  | PHYS_OFFSET: 0x80000000\n  | CPU features: 0x00000000,1035b7a3,ccfe773f\n  | Memory Limit: none\n  | ---[ end Kernel panic - not syncing: HYP panic:\n  | PS:a34023c9 PC:0000f250710b973c ESR:00000000f2000800\n  | FAR:ffff000800cb00d0 HPFAR:000000000880cb00 PAR:0000000000000000\n  | VCPU:0000000000000000 ]---\n\nFix it by checking for the successfull initialisation of kvm_arm_init()\nin finalize_pkvm() before proceeding any futher.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/91450dec0445f4d12f960ba68d8d05c3cb2ab5b8","https://git.kernel.org/stable/c/fa729bc7c9c8c17a2481358c841ef8ca920485d3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2023-53319","score":0.0014,"percentile":0.03333,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}