CVE-2022-4696 (GCVE-0-2022-4696)
Vulnerability from cvelistv5 – Published: 2023-01-11 12:33 – Updated: 2024-08-03 01:48
VLAI
EPSS
VEX
Summary
There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 13:26 UTC
CWE
- CWE-763 - Release of Invalid Pointer or Reference
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux Kernel |
Affected:
5.7-rc1 , ≤ 5.10.159
(custom)
|
guessed | |
| linux | linux_kernel |
Affected:
5.7-rc1 , ≤ 5.10.159
(custom)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Date Public
2022-12-15 05:43
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"value": "There exists a use-after-free vulnerability in the Linux kernel through io_uring and the\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eIORING_OP_SPLICE operation. If\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eIORING_OP_SPLICE is\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003emissing the IO_WQ_WORK_FILES flag, which signals that the operation won\u0027t use current-\u0026gt;nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current-\u0026gt;nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e"
}
],
"value": "There exists a use-after-free vulnerability in the Linux kernel through io_uring and the\u00a0IORING_OP_SPLICE operation. If\u00a0IORING_OP_SPLICE is\u00a0missing the IO_WQ_WORK_FILES flag, which signals that the operation won\u0027t use current-\u003ensproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current-\u003ensproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above\n"
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"capecId": "CAPEC-251",
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"cvssV3_1": {
"attackComplexity": "LOW",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"cweId": "CWE-763",
"description": "CWE-763 Release of Invalid Pointer or Reference",
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"providerMetadata": {
"dateUpdated": "2023-01-11T12:33:41.024Z",
"orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
"shortName": "Google"
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"references": [
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"url": "https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a"
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{
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y\u0026id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a"
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"cveMetadata": {
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"assignerShortName": "Google",
"cveId": "CVE-2022-4696",
"datePublished": "2023-01-11T12:33:41.024Z",
"dateReserved": "2022-12-23T13:11:04.948Z",
"dateUpdated": "2024-08-03T01:48:40.470Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
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}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.