CVE-2022-49788

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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` 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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad Patch
https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a Patch
https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7 Patch
https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609 Patch
https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d Patch
https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f Patch
https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31 Patch
https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
History

07 Nov 2025, 19:32

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad - () https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad - Patch
References () https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a - () https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a - Patch
References () https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7 - () https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7 - Patch
References () https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609 - () https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609 - Patch
References () https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d - () https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d - Patch
References () https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f - () https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f - Patch
References () https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31 - () https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31 - Patch
References () https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a - () https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a - Patch
First Time Linux
Linux linux Kernel
CWE CWE-908
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc/vmw_vmci: se corrige una fuga de información en vmci_host_do_receive_datagram() `struct vmci_event_qp` asignado por qp_notify_peer() que contiene relleno, que puede llevar datos no inicializados al espacio de usuario, como lo observó KMSAN: ERROR: KMSAN: fuga de información del kernel en 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 se almacenó en la memoria en: 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 controladores/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 controladores/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 controladores/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair controladores/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 controladores/misc/vmw_vmci/vmci_host.c:927 ... Variable local ev creada en: 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 de 48 sin inicializar. El acceso a memoria de tamaño 48 comienza en ffff888035155e00. Datos copiados a la dirección de usuario 0000000020000100. Use memset() para evitar las filtraciones de información. También se especula que se debe corregir qp_notify_peer_local(), que podría presentar el mismo problema.

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-11-07 19:32

NVD link : CVE-2022-49788

Mitre link : CVE-2022-49788

CVE.ORG link : CVE-2022-49788

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-908

Use of Uninitialized Resource