Executive Summary

Informations
Name CVE-2024-46738 First vendor Publication 2024-09-18
Vendor Cve Last vendor Modification 2024-09-20

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

VMCI: Fix use-after-free when removing resource in vmci_resource_remove()

When removing a resource from vmci_resource_table in vmci_resource_remove(), the search is performed using the resource handle by comparing context and resource fields.

It is possible though to create two resources with different types but same handle (same context and resource fields).

When trying to remove one of the resources, vmci_resource_remove() may not remove the intended one, but the object will still be freed as in the case of the datagram type in vmci_datagram_destroy_handle(). vmci_resource_table will still hold a pointer to this freed resource leading to a use-after-free vulnerability.

BUG: KASAN: use-after-free in vmci_handle_is_equal include/linux/vmw_vmci_defs.h:142 [inline] BUG: KASAN: use-after-free in vmci_resource_remove+0x3a1/0x410 drivers/misc/vmw_vmci/vmci_resource.c:147 Read of size 4 at addr ffff88801c16d800 by task syz-executor197/1592 Call Trace:

__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x82/0xa9 lib/dump_stack.c:106
print_address_description.constprop.0+0x21/0x366 mm/kasan/report.c:239
__kasan_report.cold+0x7f/0x132 mm/kasan/report.c:425
kasan_report+0x38/0x51 mm/kasan/report.c:442
vmci_handle_is_equal include/linux/vmw_vmci_defs.h:142 [inline]
vmci_resource_remove+0x3a1/0x410 drivers/misc/vmw_vmci/vmci_resource.c:147
vmci_qp_broker_detach+0x89a/0x11b9 drivers/misc/vmw_vmci/vmci_queue_pair.c:2182
ctx_free_ctx+0x473/0xbe1 drivers/misc/vmw_vmci/vmci_context.c:444
kref_put include/linux/kref.h:65 [inline]
vmci_ctx_put drivers/misc/vmw_vmci/vmci_context.c:497 [inline]
vmci_ctx_destroy+0x170/0x1d6 drivers/misc/vmw_vmci/vmci_context.c:195
vmci_host_close+0x125/0x1ac drivers/misc/vmw_vmci/vmci_host.c:143
__fput+0x261/0xa34 fs/file_table.c:282
task_work_run+0xf0/0x194 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x184/0x189 kernel/entry/common.c:187
exit_to_user_mode_prepare+0x11b/0x123 kernel/entry/common.c:220
__syscall_exit_to_user_mode_work kernel/entry/common.c:302 [inline]
syscall_exit_to_user_mode+0x18/0x42 kernel/entry/common.c:313
do_syscall_64+0x41/0x85 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x6e/0x0

This change ensures the type is also checked when removing the resource from vmci_resource_table in vmci_resource_remove().

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46738

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 3653

Sources (Detail)

https://git.kernel.org/stable/c/00fe5292f081f8d773e572df8e03bf6e1855fe49
https://git.kernel.org/stable/c/39e7e593418ccdbd151f2925fa6be1a616d16c96
https://git.kernel.org/stable/c/48b9a8dabcc3cf5f961b2ebcd8933bf9204babb7
https://git.kernel.org/stable/c/6c563a29857aa8053b67ee141191f69757f27f6e
https://git.kernel.org/stable/c/b243d52b5f6f59f9d39e69b191fb3d58b94a43b1
https://git.kernel.org/stable/c/b9efdf333174468651be40390cbc79c9f55d9cce
https://git.kernel.org/stable/c/ef5f4d0c5ee22d4f873116fec844ff6edaf3fa7d
https://git.kernel.org/stable/c/f6365931bf7c07b2b397dbb06a4f6573cc9fae73
Source Url

Alert History

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Date Informations
2025-01-08 03:05:17
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2024-12-25 03:03:27
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2024-11-23 03:03:23
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2024-11-20 02:59:53
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2024-11-09 03:00:12
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2024-10-26 02:57:34
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2024-10-25 02:59:27
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2024-10-23 02:58:38
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2024-10-03 02:53:48
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2024-10-02 02:52:12
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2024-09-21 05:27:43
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2024-09-20 17:27:28
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2024-09-18 13:27:29
  • First insertion