CVE-2022-50873
Unknown Unknown - Not Provided

Use-After-Free in Linux Kernel vdpa Component Causes Kernel Crash

Publication date: 2025-12-30

Last updated on: 2025-12-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: vdpa/vp_vdpa: fix kfree a wrong pointer in vp_vdpa_remove In vp_vdpa_remove(), the code kfree(&vp_vdpa_mgtdev->mgtdev.id_table) uses a reference of pointer as the argument of kfree, which is the wrong pointer and then may hit crash like this: Unable to handle kernel paging request at virtual address 00ffff003363e30c Internal error: Oops: 96000004 [#1] SMP Call trace: rb_next+0x20/0x5c ext4_readdir+0x494/0x5c4 [ext4] iterate_dir+0x168/0x1b4 __se_sys_getdents64+0x68/0x170 __arm64_sys_getdents64+0x24/0x30 el0_svc_common.constprop.0+0x7c/0x1bc do_el0_svc+0x2c/0x94 el0_svc+0x20/0x30 el0_sync_handler+0xb0/0xb4 el0_sync+0x160/0x180 Code: 54000220 f9400441 b4000161 aa0103e0 (f9400821) SMP: stopping secondary CPUs Starting crashdump kernel...

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Meta Information

Published
2025-12-30
Last Modified
2025-12-30
Generated
2026-07-06
AI Q&A
2025-12-30
EPSS Evaluated
2026-07-05
NVD
CVE-2022-50873
EUVD
EUVD-2022-55825

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's vdpa/vp_vdpa component. In the function vp_vdpa_remove(), the code incorrectly calls kfree() with the address of a pointer (a reference) instead of the pointer itself. This misuse of kfree() leads to a crash in the kernel, causing an 'Unable to handle kernel paging request' error and an internal kernel error (Oops).

Impact Analysis

This vulnerability can cause the Linux kernel to crash unexpectedly due to improper memory deallocation. Such crashes can lead to system instability, downtime, and potential loss of data or service availability.

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