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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 4af5f2e0301311f88c420fcfc5f3c8611ade20ac – < 4e9b3ec84dc97909876641dad14e0a2300d6c2a3
- affected 4af5f2e0301311f88c420fcfc5f3c8611ade20ac – < 879947f4180bc6e83af64eb0515e0cf57fce15db
- affected 4af5f2e0301311f88c420fcfc5f3c8611ade20ac – < 56bd7901b5e9dbc9112036ea615ebcba1565fafe
- affected 4af5f2e0301311f88c420fcfc5f3c8611ade20ac – < 327462725b0f759f093788dfbcb2f1fd132f956b
- affected 5.14
- unaffected < 5.14
- unaffected 6.1.63 – ≤ 6.1.*
- unaffected 6.5.12 – ≤ 6.5.*
- unaffected 6.6.2 – ≤ 6.6.*
- unaffected 6.7 – ≤ *
References (4)
- https://git.kernel.org/stable/c/4e9b3ec84dc97909876641dad14e0a2300d6c2a3 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/879947f4180bc6e83af64eb0515e0cf57fce15db (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/56bd7901b5e9dbc9112036ea615ebcba1565fafe (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/327462725b0f759f093788dfbcb2f1fd132f956b (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-52837)Record last updated .