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CVE-2023-52837

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CVE-2023-52837

Published: May 21, 2024

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
4af5f2e0301311f88c420fcfc5f3c8611ade20ac - < 4e9b3ec84dc97909876641dad14e0a2300d6c2a3
affected
4af5f2e0301311f88c420fcfc5f3c8611ade20ac - < 879947f4180bc6e83af64eb0515e0cf57fce15db
affected
4af5f2e0301311f88c420fcfc5f3c8611ade20ac - < 56bd7901b5e9dbc9112036ea615ebcba1565fafe
affected
4af5f2e0301311f88c420fcfc5f3c8611ade20ac - < 327462725b0f759f093788dfbcb2f1fd132f956b

Linux

Linux

affected
5.14
unaffected
0 - < 5.14
unaffected
6.1.63 - <= 6.1.*
unaffected
6.5.12 - <= 6.5.*
unaffected
6.6.2 - <= 6.6.*

+1 more versions

References

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