CVE-2022-49788

Advisory lineage Upstream: 0 Downstream: 23
Analyzed
Published: 01 May 2025, 14:09
Last modified:11 May 2026, 19:06

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability +0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 May 2025, 14:09
Published
Vulnerability first disclosed
11 May 2026, 19:06
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 10%

Techniques & Countermeasures

  • CWE-908•Use of Uninitialized Resource

    The product uses or accesses a resource that has not been initialized.

Affected Systems

  • linux•linux

    ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < 7ccf7229b96fadc3a185d1391f814a604c7ef609 | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < f04586c2315cfd03d72ad0395705435e7ed07b1a | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < 5a275528025ae4bc7e2232866856dfebf84b2fad | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < e7061dd1fef2dfb6458cd521aef27aa66f510d31 | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < 62634b43d3c4e1bf62fd540196f7081bf0885c0a | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < 8e2f33c598370bcf828bab4d667d1d38bcd3c57d | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < 76c50d77b928a33e5290aaa9fdc10e88254ff8c7 | ≥ 06164d2b72aa752ce4633184b3e0d97601017135, < e5b0d06d9b10f5f43101bd6598b076c347f9295f | 3.9

  • linux•linux_kernel

    ≥ 3.9, < 4.9.334 | ≥ 4.10, < 4.14.300 | ≥ 4.15, < 4.19.267 | ≥ 4.20, < 5.4.225 | ≥ 5.5, < 5.10.156 | ≥ 5.11, < 5.15.80 | ≥ 5.16, < 6.0.10 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5

References (8)