CVE-2023-52837

medium

Description

In the Linux kernel, the following vulnerability has been resolved: nbd: fix uaf in nbd_open Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set disk->private_data as NULL as before. UAF may be triggered in nbd_open() if someone tries to open nbd device right after nbd_put() since nbd has been free in nbd_dev_remove(). Fix this by implementing ->free_disk and free private data in it.

References

https://git.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15db

https://git.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafe

https://git.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3

https://git.kernel.org/stable/c/327462725b0f759f093788dfbcb2f1fd132f956b

Details

Source: Mitre, NVD

Published: 2024-05-21

Updated: 2024-05-21

Risk Information

CVSS v2

Base Score: 6.5

Vector: CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 4.4

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Severity: Medium