{"id":"CVE-2023-54007","summary":"vmci_host: fix a race condition in vmci_host_poll() causing GPF","details":"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\u003c- omitting registers -\u003e\nCall Trace:\n \u003cTASK\u003e\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-\u003econtext;\n                                    // Initialize context\n                                    vmci_host_dev-\u003econtext = vmci_ctx_create();\n                                    vmci_host_dev-\u003ect_type = VMCIOBJ_CONTEXT;\n\nif (vmci_host_dev-\u003ect_type == VMCIOBJ_CONTEXT) {\n    // Dereferencing the wrong pointer\n    poll_wait(..., &context-\u003ehost_context);\n}\n\nIn this scenario, vmci_host_poll() reads vmci_host_dev-\u003econtext first,\nand then reads vmci_host_dev-\u003ect_type to check that\nvmci_host_dev-\u003econtext 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-\u003econtext after checking\nthe value of vmci_host_dev-\u003ect_type so that vmci_host_poll() always\nreads an initialized context.","modified":"2026-04-02T09:45:28.368095Z","published":"2025-12-24T10:55:41.281Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0617-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54007.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2053e93ac15519ed1f1fe6eba79a33a4963be4a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67e35824f861a05b44b19d38e16a83f653bd9d92"},{"type":"WEB","url":"https://git.kernel.org/stable/c/770d30b1355c6c8879973dd054fca9168def182c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/85b4aa4eb2e3a0da111fd0a1cdbf00f986ac6b6b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab64bd32b9fac27ff4737d63711b9db5e5462448"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae13381da5ff0e8e084c0323c3cc0a945e43e9c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ca0f4ad2b7a36c799213ef0a213eb977a51e03dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d22b2a35729cb1de311cb650cd67518a24e13fc9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54007.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54007"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8bf503991f87e32ea42a7bd69b79ba084fddc5d7"},{"fixed":"2053e93ac15519ed1f1fe6eba79a33a4963be4a3"},{"fixed":"ca0f4ad2b7a36c799213ef0a213eb977a51e03dc"},{"fixed":"85b4aa4eb2e3a0da111fd0a1cdbf00f986ac6b6b"},{"fixed":"770d30b1355c6c8879973dd054fca9168def182c"},{"fixed":"d22b2a35729cb1de311cb650cd67518a24e13fc9"},{"fixed":"67e35824f861a05b44b19d38e16a83f653bd9d92"},{"fixed":"ab64bd32b9fac27ff4737d63711b9db5e5462448"},{"fixed":"ae13381da5ff0e8e084c0323c3cc0a945e43e9c7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54007.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"4.19.283"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.243"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.180"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.28"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.15"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.3.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54007.json"}}],"schema_version":"1.7.5"}