CVE-2023-52439 (GCVE-0-2023-52439)
Vulnerability from cvelistv5 – Published: 2024-02-20 18:34 – Updated: 2026-08-05 09:09
VLAI
EPSS
VEX
Title
uio: Fix use-after-free in uio_open
Summary
In the Linux kernel, the following vulnerability has been resolved:
uio: Fix use-after-free in uio_open
core-1 core-2
-------------------------------------------------------
uio_unregister_device uio_open
idev = idr_find()
device_unregister(&idev->dev)
put_device(&idev->dev)
uio_device_release
get_device(&idev->dev)
kfree(idev)
uio_free_minor(minor)
uio_release
put_device(&idev->dev)
kfree(idev)
-------------------------------------------------------
In the core-1 uio_unregister_device(), the device_unregister will kfree
idev when the idev->dev kobject ref is 1. But after core-1
device_unregister, put_device and before doing kfree, the core-2 may
get_device. Then:
1. After core-1 kfree idev, the core-2 will do use-after-free for idev.
2. When core-2 do uio_release and put_device, the idev will be double
freed.
To address this issue, we can get idev atomic & inc idev reference with
minor_lock.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:02 UTC
Assigner
References
11 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 3174e0f7de1ba392dc191625da83df02d695b60c
(git)
Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < e93da893d52d82d57fc0db2ca566024e0f26ff50 (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 5e0be1229ae199ebb90b33102f74a0f22d152570 (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 17a8519cb359c3b483fb5c7367efa9a8a508bdea (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 35f102607054faafe78d2a6994b18d5d9d6e92ad (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 913205930da6213305616ac539447702eaa85e41 (git) Affected: 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 , < 0c9ae0b8605078eafc3bea053cc78791e97ba2e2 (git) Affected: 13af019c87f2d90e663742cb1a819834048842ae (git) Affected: 4.14.100 , < 4.15 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.18
Unaffected: 0 , < 4.18 (semver) Unaffected: 4.19.306 , ≤ 4.19.* (semver) Unaffected: 5.4.268 , ≤ 5.4.* (semver) Unaffected: 5.10.209 , ≤ 5.10.* (semver) Unaffected: 5.15.148 , ≤ 5.15.* (semver) Unaffected: 6.1.74 , ≤ 6.1.* (semver) Unaffected: 6.6.13 , ≤ 6.6.* (semver) Unaffected: 6.7.1 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
guessed |
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},
{
"url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50"
},
{
"url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570"
},
{
"url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7"
},
{
"url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea"
},
{
"url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad"
},
{
"url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41"
},
{
"url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2"
}
],
"title": "uio: Fix use-after-free in uio_open",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-52439",
"datePublished": "2024-02-20T18:34:49.323Z",
"dateReserved": "2024-02-20T12:30:33.291Z",
"dateUpdated": "2025-05-04T12:49:00.841Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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