In the Linux kernel, the following vulnerability has been resolved:
ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition
In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev
function, then &sndev->check_link_status_work is bound with
check_link_status_work. switchtec_ntb_link_notification may be called
to start the work.
If we remove the module which will call switchtec_ntb_remove to make
cleanup, it will free sndev through kfree(sndev), while the work
mentioned above will be used. The sequence of operations that may lead
to a UAF bug is as follows:
CPU0 CPU1
| check_link_status_work
switchtec_ntb_remove |
kfree(sndev); |
| if (sndev->link_force_down)
| // use sndev
Fix it by ensuring that the work is canceled before proceeding with
the cleanup in switchtec_ntb_remove.
References
Configurations
Configuration 1 (hide)
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History
03 Nov 2025, 23:16
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03 Nov 2025, 21:16
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Information
Published : 2024-10-21 20:15
Updated : 2025-11-03 23:16
NVD link : CVE-2024-50059
Mitre link : CVE-2024-50059
CVE.ORG link : CVE-2024-50059
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free