CVE-2023-52837 Affecting kernel-64kb-devel package, versions <6.4.0-150600.23.14.1
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Test your applications- Snyk ID SNYK-SLES156-KERNEL64KBDEVEL-7550127
- published 23 Jul 2024
- disclosed 22 Jul 2024
Introduced: 22 Jul 2024
CVE-2023-52837 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 kernel-64kb-devel to version 6.4.0-150600.23.14.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-64kb-devel package and not the kernel-64kb-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
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://www.suse.com/security/cve/CVE-2023-52837.html
- https://bugzilla.suse.com/1224935
- https://git.kernel.org/stable/c/327462725b0f759f093788dfbcb2f1fd132f956b
- https://git.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3
- https://git.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafe
- https://git.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15db