{"cve":"CVE-2023-54007","nvd":{"published":"2025-12-24T11:15:53.633","modified":"2026-06-17T06:46:31.600","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvmci_host: fix a race condition in vmci_host_poll() causing GPF\n\nDuring fuzzing, a general protection fault is observed in\nvmci_host_poll().\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]\nRIP: 0010:__lock_acquire+0xf3/0x5e00 kernel/locking/lockdep.c:4926\n<- omitting registers ->\nCall Trace:\n <TASK>\n lock_acquire+0x1a4/0x4a0 kernel/locking/lockdep.c:5672\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\n _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162\n add_wait_queue+0x3d/0x260 kernel/sched/wait.c:22\n poll_wait include/linux/poll.h:49 [inline]\n vmci_host_poll+0xf8/0x2b0 drivers/misc/vmw_vmci/vmci_host.c:174\n vfs_poll include/linux/poll.h:88 [inline]\n do_pollfd fs/select.c:873 [inline]\n do_poll fs/select.c:921 [inline]\n do_sys_poll+0xc7c/0x1aa0 fs/select.c:1015\n __do_sys_ppoll fs/select.c:1121 [inline]\n __se_sys_ppoll+0x2cc/0x330 fs/select.c:1101\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nExample thread interleaving that causes the general protection fault\nis as follows:\n\nCPU1 (vmci_host_poll)               CPU2 (vmci_host_do_init_context)\n-----                               -----\n// Read uninitialized context\ncontext = vmci_host_dev->context;\n                                    // Initialize context\n                                    vmci_host_dev->context = vmci_ctx_create();\n                                    vmci_host_dev->ct_type = VMCIOBJ_CONTEXT;\n\nif (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {\n    // Dereferencing the wrong pointer\n    poll_wait(..., &context->host_context);\n}\n\nIn this scenario, vmci_host_poll() reads vmci_host_dev->context first,\nand then reads vmci_host_dev->ct_type to check that\nvmci_host_dev->context is initialized. However, since these two reads\nare not atomically executed, there is a chance of a race condition as\ndescribed above.\n\nTo fix this race condition, read vmci_host_dev->context after checking\nthe value of vmci_host_dev->ct_type so that vmci_host_poll() always\nreads an initialized context.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/2053e93ac15519ed1f1fe6eba79a33a4963be4a3","https://git.kernel.org/stable/c/67e35824f861a05b44b19d38e16a83f653bd9d92","https://git.kernel.org/stable/c/770d30b1355c6c8879973dd054fca9168def182c","https://git.kernel.org/stable/c/85b4aa4eb2e3a0da111fd0a1cdbf00f986ac6b6b","https://git.kernel.org/stable/c/ab64bd32b9fac27ff4737d63711b9db5e5462448"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:17:07.138532058+00:00"},"epss":{"cve":"CVE-2023-54007","score":0.0022,"percentile":0.12583,"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."]}