Vulnerability-Lookup

GHSA-HGCX-34QP-J38M

Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-01-15 18:30

Details

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.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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  "affected": [],
  "aliases": [
    "CVE-2023-52837"
  ],
  "database_specific": {
    "cwe_ids": [
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    "github_reviewed_at": null,
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    "severity": "HIGH"
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  "id": "GHSA-hgcx-34qp-j38m",
  "modified": "2025-01-15T18:30:54Z",
  "published": "2024-05-21T18:31:22Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52837"
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CVE-2023-52837 (GCVE-0-2023-52837)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-05-11 19:33

Title

nbd: fix uaf in nbd_open

Summary

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.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/4e9b3ec84dc979098…
https://git.kernel.org/stable/c/879947f4180bc6e83…
https://git.kernel.org/stable/c/56bd7901b5e9dbc91…
https://git.kernel.org/stable/c/327462725b0f759f0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4af5f2e0301311f88c420fcfc5f3c8611ade20ac , < 4e9b3ec84dc97909876641dad14e0a2300d6c2a3 (git) Affected: 4af5f2e0301311f88c420fcfc5f3c8611ade20ac , < 879947f4180bc6e83af64eb0515e0cf57fce15db (git) Affected: 4af5f2e0301311f88c420fcfc5f3c8611ade20ac , < 56bd7901b5e9dbc9112036ea615ebcba1565fafe (git) Affected: 4af5f2e0301311f88c420fcfc5f3c8611ade20ac , < 327462725b0f759f093788dfbcb2f1fd132f956b (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 6.1.63 , ≤ 6.1.* (semver) Unaffected: 6.5.12 , ≤ 6.5.* (semver) Unaffected: 6.6.2 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-HGCX-34QP-J38M

CVE-2023-52837 (GCVE-0-2023-52837)

Tags

Sightings

Nomenclature