{"id":"CVE-2022-49788","state":"PUBLISHED","title":"misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()","description":"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.","publishedAt":"2025-05-01T14:09:20.506Z","updatedAt":"2026-05-11T19:06:47.654Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"7ccf7229b96fadc3a185d1391f814a604c7ef609","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"f04586c2315cfd03d72ad0395705435e7ed07b1a","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"5a275528025ae4bc7e2232866856dfebf84b2fad","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"e7061dd1fef2dfb6458cd521aef27aa66f510d31","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"62634b43d3c4e1bf62fd540196f7081bf0885c0a","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"8e2f33c598370bcf828bab4d667d1d38bcd3c57d","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"76c50d77b928a33e5290aaa9fdc10e88254ff8c7","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"e5b0d06d9b10f5f43101bd6598b076c347f9295f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/misc/vmw_vmci/vmci_queue_pair.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"4.9.334","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.300","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.267","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.225","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.156","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.80","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.10","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/misc/vmw_vmci/vmci_queue_pair.c"]}],"references":["https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609","https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a","https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad","https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31","https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a","https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d","https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7","https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49788.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49788","state":"PUBLISHED","datePublished":"2025-05-01T14:09:20.506Z","dateUpdated":"2026-05-11T19:06:47.654Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-01T14:05:17.223Z"},"containers":{"cna":{"title":"misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"7ccf7229b96fadc3a185d1391f814a604c7ef609","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"f04586c2315cfd03d72ad0395705435e7ed07b1a","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"5a275528025ae4bc7e2232866856dfebf84b2fad","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"e7061dd1fef2dfb6458cd521aef27aa66f510d31","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"62634b43d3c4e1bf62fd540196f7081bf0885c0a","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"8e2f33c598370bcf828bab4d667d1d38bcd3c57d","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"76c50d77b928a33e5290aaa9fdc10e88254ff8c7","versionType":"git"},{"version":"06164d2b72aa752ce4633184b3e0d97601017135","status":"affected","lessThan":"e5b0d06d9b10f5f43101bd6598b076c347f9295f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/misc/vmw_vmci/vmci_queue_pair.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"4.9.334","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.300","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.267","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.225","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.156","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.80","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.10","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/misc/vmw_vmci/vmci_queue_pair.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:06:47.654Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.9.334"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.14.300"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"4.19.267"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.4.225"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}