CVE-2023-0461 (GCVE-0-2023-0461)
Vulnerability from cvelistv5 – Published: 2023-02-28 14:23 – Updated: 2025-02-13 16:38
VLAI
EPSS
VEX
Title
Use-after-free vulnerability in the Linux Kernel
Summary
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.
There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.
When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.
The setsockopt TCP_ULP operation does not require any privilege.
We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 15:55 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux Kernel |
Affected:
0 , < 2c02d41d71f90a5168391b6a5f2954112ba2307c
(git)
|
guessed |
Date Public
2023-01-02 23:00
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"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-06T20:24:43+00:00",
"cve": "CVE-2023-0461",
"id": "CVE-2023-0461",
"initial_release_date": "2023-02-23T00:00:00+00:00",
"product_status:fixed": "1218",
"product_status:known_not_affected": "46",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net/ulp: use-after-free in listening ULP sockets",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-0461.json",
"version": "3"
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"current_release_date": "2026-09-02T01:59:03Z",
"cve": "CVE-2023-0461",
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"initial_release_date": "2025-02-14T07:07:20Z",
"product_status:known_affected": "285",
"product_status:known_not_affected": "74",
"product_status:recommended": "1298",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-0461",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-0461.json",
"version": "31"
},
"vulnrichment": {
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To reach the vulnerability kernel configuration flag CONFIG_TLS\\u00a0or CONFIG_XFRM_ESPINTCP\\u00a0has to be configured, but the operation does not require any privilege.\\n\\nThere is a use-after-free bug of icsk_ulp_data\\u00a0of a struct inet_connection_sock.\\n\\nWhen CONFIG_TLS\\u00a0is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.\\n\\nThe setsockopt\\u00a0TCP_ULP\\u00a0operation does not require any privilege.\\n\\nWe recommend upgrading past commit\\u00a02c02d41d71f90a5168391b6a5f2954112ba2307c\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThere is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag \u003ccode\u003eCONFIG_TLS\u003c/code\u003e\u0026nbsp;or \u003ccode\u003eCONFIG_XFRM_ESPINTCP\u003c/code\u003e\u0026nbsp;has to be configured, but the operation does not require any privilege.\u003c/p\u003e\u003cp\u003eThere is a use-after-free bug of \u003ccode\u003eicsk_ulp_data\u003c/code\u003e\u0026nbsp;of a \u003ccode\u003estruct inet_connection_sock\u003c/code\u003e.\u003c/p\u003e\u003cp\u003eWhen \u003ccode\u003eCONFIG_TLS\u003c/code\u003e\u0026nbsp;is enabled, user can install a tls context (\u003ccode\u003estruct tls_context\u003c/code\u003e) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.\u003c/p\u003e\u003cp\u003eThe \u003ccode\u003esetsockopt\u003c/code\u003e\u0026nbsp;\u003ccode\u003eTCP_ULP\u003c/code\u003e\u0026nbsp;operation does not require any privilege.\u003c/p\u003eWe recommend upgrading past commit\u0026nbsp;2c02d41d71f90a5168391b6a5f2954112ba2307c\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"shortName\": \"Google\", \"dateUpdated\": \"2023-05-03T13:06:48.668Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-0461\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-13T16:38:58.993Z\", \"dateReserved\": \"2023-01-24T09:47:24.966Z\", \"assignerOrgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"datePublished\": \"2023-02-28T14:23:02.224Z\", \"assignerShortName\": \"Google\"}",
"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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