CVE-2023-52837
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-52837
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2023-52837.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2024:9315
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.64-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.6.8-1 |
| debian | sid | fixed | 6.6.8-1 |
| debian | trixie | fixed | 6.6.8-1 |
References
Verify integrity in audit chain (admin only). AS-IS.