CVE-2026-52920 (GCVE-0-2026-52920)
Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-05 12:31
VLAI
EPSS
VEX
Title
netfilter: xt_policy: fix strict mode inbound policy matching
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xt_policy: fix strict mode inbound policy matching
match_policy_in() walks sec_path entries from the last transform to the
first one, but strict policy matching needs to consume info->pol[] in
the same forward order as the rule layout.
Derive the strict-match policy position from the number of transforms
already consumed so that multi-element inbound rules are matched
consistently.
Severity
8.3 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < eb323f7b82d2e2f638de0cc2a177803eb20e0707
(git)
Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < fc1c518bb1f054831ecabb32da9b8e1dff9699c6 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < f98b7f85e04b40e28b08c461ded0cc79f14f5509 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 82664d0f1ba25e4f9a71994954abae24c60f4067 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 938867e870fb5471bb16f442aeac81326e05bf65 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 392cc1d8408b5665215c1e9290bbf0f92339b043 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 4b2b4d7d4e203c92db8966b163edfacb1f0e1e29 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.17
Unaffected: 0 , < 2.6.17 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f98b7f85e04b40e28b08c461ded0cc79f14f5509"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/fc1c518bb1f054831ecabb32da9b8e1dff9699c6"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-17T12:41:27+00:00",
"cve": "CVE-2026-52920",
"id": "CVE-2026-52920",
"initial_release_date": "2026-06-24T00:00:00+00:00",
"product_status:fixed": "453",
"product_status:known_affected": "140",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: netfilter: xt_policy: fix strict mode inbound policy matching",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52920.json",
"version": "3"
}
}
}
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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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