{"id":"CVE-2022-49788","title":"misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 7ccf7229b96fadc3a185d1391f814a604c7ef609","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < f04586c2315cfd03d72ad0395705435e7ed07b1a","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 5a275528025ae4bc7e2232866856dfebf84b2fad","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < e7061dd1fef2dfb6458cd521aef27aa66f510d31","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 62634b43d3c4e1bf62fd540196f7081bf0885c0a","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 8e2f33c598370bcf828bab4d667d1d38bcd3c57d","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 76c50d77b928a33e5290aaa9fdc10e88254ff8c7","Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < e5b0d06d9b10f5f43101bd6598b076c347f9295f","Linux 3.9"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:48:00.593549Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:48.761Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49788","references":[{"url":"https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609"},{"url":"https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a"},{"url":"https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad"},{"url":"https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31"},{"url":"https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a"},{"url":"https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d"},{"url":"https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7"},{"url":"https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f"}],"tags":["cve.org"],"epss":0.00234,"epssPercentile":0.14382,"ingestedAt":"2026-11-05T22:38:31.594Z","slug":"CVE-2022-49788","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 7ccf7229b96fadc3a185d1391f814a604c7ef609`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < f04586c2315cfd03d72ad0395705435e7ed07b1a`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 5a275528025ae4bc7e2232866856dfebf84b2fad`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < e7061dd1fef2dfb6458cd521aef27aa66f510d31`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 62634b43d3c4e1bf62fd540196f7081bf0885c0a`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 8e2f33c598370bcf828bab4d667d1d38bcd3c57d`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < 76c50d77b928a33e5290aaa9fdc10e88254ff8c7`\n- `Linux >= 06164d2b72aa752ce4633184b3e0d97601017135 < e5b0d06d9b10f5f43101bd6598b076c347f9295f`\n- `Linux 3.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}