cbcvebase.
CVE-2022-49788
published 2025-05-01

CVE-2022-49788: In the Linux kernel, the following vulnerability has been resolved: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() `struct vmci_event_qp`…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
11.1th percentile
In the Linux kernel, the following vulnerability has been resolved: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() `struct vmci_event_qp` allocated by qp_notify_peer() contains padding, which may carry uninitialized data to the userspace, as observed by KMSAN: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121 instrument_copy_to_user ./include/linux/instrumented.h:121 _copy_to_user+0x5f/0xb0 lib/usercopy.c:33 copy_to_user ./include/linux/uaccess.h:169 vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431 vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925 vfs_ioctl fs/ioctl.c:51 ... Uninit was stored to memory at: kmemdup+0x74/0xb0 mm/util.c:131 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271 vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339 qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927 ... Local variable ev created at: qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 Bytes 28-31 of 48 are uninitialized Memory access of size 48 starts at ffff888035155e00 Data copied to user address 0000000020000100 Use memset() to prevent the infoleaks. Also speculatively fix qp_notify_peer_local(), which may suffer from the same problem.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.10-1 (bookworm)linux 6.0.10-1 (bookworm)
linuxlinux——
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < 7ccf7229b96fadc3a185d1391f814a604c7ef6097ccf7229b96fadc3a185d1391f814a604c7ef609
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < f04586c2315cfd03d72ad0395705435e7ed07b1af04586c2315cfd03d72ad0395705435e7ed07b1a
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < 5a275528025ae4bc7e2232866856dfebf84b2fad5a275528025ae4bc7e2232866856dfebf84b2fad
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < e7061dd1fef2dfb6458cd521aef27aa66f510d31e7061dd1fef2dfb6458cd521aef27aa66f510d31
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < 62634b43d3c4e1bf62fd540196f7081bf0885c0a62634b43d3c4e1bf62fd540196f7081bf0885c0a
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < 8e2f33c598370bcf828bab4d667d1d38bcd3c57d8e2f33c598370bcf828bab4d667d1d38bcd3c57d
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < 76c50d77b928a33e5290aaa9fdc10e88254ff8c776c50d77b928a33e5290aaa9fdc10e88254ff8c7
linuxlinux>= 06164d2b72aa752ce4633184b3e0d97601017135 < e5b0d06d9b10f5f43101bd6598b076c347f9295fe5b0d06d9b10f5f43101bd6598b076c347f9295f
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 3.9 < 4.9.3344.9.334
linuxlinux_kernel>= 4.10 < 4.14.3004.14.300
linuxlinux_kernel>= 4.15 < 4.19.2674.19.267
linuxlinux_kernel>= 4.20 < 5.4.2255.4.225
linuxlinux_kernel>= 5.11 < 5.15.805.15.80
linuxlinux_kernel>= 5.16 < 6.0.106.0.10
linuxlinux_kernel>= 5.5 < 5.10.1565.10.156

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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