{"id":"CVE-2022-49788","summary":"misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()\n\n`struct vmci_event_qp` allocated by qp_notify_peer() contains padding,\nwhich may carry uninitialized data to the userspace, as observed by\nKMSAN:\n\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121\n   instrument_copy_to_user ./include/linux/instrumented.h:121\n   _copy_to_user+0x5f/0xb0 lib/usercopy.c:33\n   copy_to_user ./include/linux/uaccess.h:169\n   vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431\n   vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925\n   vfs_ioctl fs/ioctl.c:51\n  ...\n\n  Uninit was stored to memory at:\n   kmemdup+0x74/0xb0 mm/util.c:131\n   dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271\n   vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339\n   qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\n   vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940\n   vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488\n   vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927\n  ...\n\n  Local variable ev created at:\n   qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\n\n  Bytes 28-31 of 48 are uninitialized\n  Memory access of size 48 starts at ffff888035155e00\n  Data copied to user address 0000000020000100\n\nUse memset() to prevent the infoleaks.\n\nAlso speculatively fix qp_notify_peer_local(), which may suffer from the\nsame problem.","modified":"2026-04-03T13:14:37.164642Z","published":"2025-05-01T14:09:20.506Z","related":["ALSA-2025:11298","ALSA-2025:11299","ALSA-2025:12746","SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:01982-1","SUSE-SU-2025:01983-1","SUSE-SU-2025:01995-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49788.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49788.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49788"},{"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":"06164d2b72aa752ce4633184b3e0d97601017135"},{"fixed":"7ccf7229b96fadc3a185d1391f814a604c7ef609"},{"fixed":"f04586c2315cfd03d72ad0395705435e7ed07b1a"},{"fixed":"5a275528025ae4bc7e2232866856dfebf84b2fad"},{"fixed":"e7061dd1fef2dfb6458cd521aef27aa66f510d31"},{"fixed":"62634b43d3c4e1bf62fd540196f7081bf0885c0a"},{"fixed":"8e2f33c598370bcf828bab4d667d1d38bcd3c57d"},{"fixed":"76c50d77b928a33e5290aaa9fdc10e88254ff8c7"},{"fixed":"e5b0d06d9b10f5f43101bd6598b076c347f9295f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49788.json"}}],"schema_version":"1.7.5"}