CVE-2023-52923 (GCVE-0-2023-52923)
Vulnerability from cvelistv5 – Published: 2025-01-20 10:48 – Updated: 2026-08-05 09:12
VLAI
EPSS
VEX
Title
netfilter: nf_tables: adapt set backend to use GC transaction API
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: adapt set backend to use GC transaction API
Use the GC transaction API to replace the old and buggy gc API and the
busy mark approach.
No set elements are removed from async garbage collection anymore,
instead the _DEAD bit is set on so the set element is not visible from
lookup path anymore. Async GC enqueues transaction work that might be
aborted and retried later.
rbtree and pipapo set backends does not set on the _DEAD bit from the
sync GC path since this runs in control plane path where mutex is held.
In this case, set elements are deactivated, removed and then released
via RCU callback, sync GC never fails.
Severity
7.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < cb4d00b563675ba8ff6ef94b077f58d816f68ba3
(git)
Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < c357648929c8dff891502349769aafb8f0452bc2 (git) Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 146c76866795553dbc19998f36718d7986ad302b (git) Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < 479a2cf5259347d6a1f658b0f791d27a34908e91 (git) Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < df650d6a4bf47248261b61ef6b174d7c54034d15 (git) Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681 (git) Affected: 9d0982927e79049675cb6c6c04a0ebb3dad5a434 , < f6c383b8c31a93752a52697f8430a71dcbc46adf (git) |
guessed | |
| Linux | Linux |
Affected:
4.1
Unaffected: 0 , < 4.1 (semver) Unaffected: 4.19.316 , ≤ 4.19.* (semver) Unaffected: 5.4.262 , ≤ 5.4.* (semver) Unaffected: 5.10.198 , ≤ 5.10.* (semver) Unaffected: 5.15.134 , ≤ 5.15.* (semver) Unaffected: 6.1.56 , ≤ 6.1.* (semver) Unaffected: 6.4.11 , ≤ 6.4.* (semver) Unaffected: 6.5 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: adaptar el backend del conjunto para usar la API de transacci\u00f3n de GC Use la API de transacci\u00f3n de GC para reemplazar la antigua y defectuosa API de gc y el enfoque de marca de ocupado. Ya no se eliminan elementos del conjunto de la recolecci\u00f3n de basura as\u00edncrona, en su lugar, se activa el bit _DEAD para que el elemento del conjunto ya no sea visible desde la ruta de b\u00fasqueda. La recolecci\u00f3n de basura as\u00edncrona pone en cola el trabajo de la transacci\u00f3n que podr\u00eda abortarse y reintentarse m\u00e1s tarde. Los backends de conjunto de rbtree y pipapo no activan el bit _DEAD de la ruta de GC de sincronizaci\u00f3n, ya que esto se ejecuta en la ruta del plano de control donde se mantiene el mutex. En este caso, los elementos del conjunto se desactivan, se eliminan y luego se liberan a trav\u00e9s de la devoluci\u00f3n de llamada de RCU, la GC de sincronizaci\u00f3n nunca falla."
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"id": "CVE-2023-52923",
"lastModified": "2026-08-04T10:18:49.430",
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/c357648929c8dff891502349769aafb8f0452bc2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/cb4d00b563675ba8ff6ef94b077f58d816f68ba3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/df650d6a4bf47248261b61ef6b174d7c54034d15"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f6c383b8c31a93752a52697f8430a71dcbc46adf"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T19:22:53+00:00",
"cve": "CVE-2023-52923",
"id": "CVE-2023-52923",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_affected": "76",
"product_status:known_not_affected": "198",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: netfilter: nf_tables: adapt set backend to use GC transaction API",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52923.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T02:23:56Z",
"cve": "CVE-2023-52923",
"id": "CVE-2023-52923",
"initial_release_date": "2025-01-21T04:08:03Z",
"product_status:known_affected": "426",
"product_status:known_not_affected": "213",
"product_status:recommended": "582",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-52923",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52923.json",
"version": "138"
}
}
}
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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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