CVE-2023-53257 (GCVE-0-2023-53257)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:46 – Updated: 2026-08-05 09:13
VLAI
EPSS
VEX
Title
wifi: mac80211: check S1G action frame size
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: check S1G action frame size
Before checking the action code, check that it even
exists in the frame.
Severity
7.1 (High)
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:02 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f5a4c24e689f54e66201f04d343bdd2e8a1d7923 , < fedd9377dd9c71a950d432fbe1628eebfbed70a1
(git)
Affected: f5a4c24e689f54e66201f04d343bdd2e8a1d7923 , < 7ae7a1378a119780c8c17a6b5fc03011c3bb7029 (git) Affected: f5a4c24e689f54e66201f04d343bdd2e8a1d7923 , < 5e030a2509be72b452b6f4a800786d43229414db (git) Affected: f5a4c24e689f54e66201f04d343bdd2e8a1d7923 , < 19e4a47ee74718a22e963e8a647c8c3bfe8bb05c (git) |
guessed | |
| Linux | Linux |
Affected:
5.15
Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.133 , ≤ 5.15.* (semver) Unaffected: 6.1.55 , ≤ 6.1.* (semver) Unaffected: 6.5.5 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
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"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.133",
"versionStartIncluding": "5.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.55",
"versionStartIncluding": "5.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5.5",
"versionStartIncluding": "5.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6",
"versionStartIncluding": "5.15",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: check S1G action frame size\n\nBefore checking the action code, check that it even\nexists in the frame."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - The bug is in ieee80211_rx_h_action() on the mac80211 Wi\u2011Fi RX path; an attacker on the same radio/LAN segment injects a truncated S1G action frame (category present, action_code missing). Wi\u2011Fi frame injection is Adjacent, not Network or Local.\nAC:L - The attacker fully controls frame length and contents and can deterministically send a 25-byte action frame (IEEE80211_MIN_ACTION_SIZE) with WLAN_CATEGORY_S1G; no race or attacker-uncontrollable condition is required.\nPR:N - S1G action frames are non-robust, so MFP does not require encryption; an unauthenticated adjacent peer who is associated (e.g. open AP) or who spoofs an associated STA\u2019s MAC reaches the path with no local account or capability on the victim.\nUI:N - The attacker triggers the path solely by transmitting the crafted management frame; no separate victim action (mount, open, click) is required beyond the interface already receiving Wi\u2011Fi frames.\nS:U - The out-of-bounds/uninit read and any resulting fault stay inside the host kernel mac80211 authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:L - The defect is a strictly 1-byte out-of-bounds/uninit read of s1g.action_code past skb-\u003elen into adjacent/uninitialized skb memory, used only in a switch; that is a small bounded read, not an arbitrary read primitive, so Confidentiality is Low.\nI:N - This is a read-only length-check omission with no OOB write, UAF, or control-flow write primitive; the TWT follow-on path has its own length checks and does not grant an integrity or code-execution primitive.\nA:H - Reading past valid frame data into invalid/unmapped skb memory can oops/panic the kernel (as reflected by the KMSAN finding that motivated the fix), and an adjacent peer can trigger this repeatedly, so Availability is High."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T09:13:19.341Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/fedd9377dd9c71a950d432fbe1628eebfbed70a1"
},
{
"url": "https://git.kernel.org/stable/c/7ae7a1378a119780c8c17a6b5fc03011c3bb7029"
},
{
"url": "https://git.kernel.org/stable/c/5e030a2509be72b452b6f4a800786d43229414db"
},
{
"url": "https://git.kernel.org/stable/c/19e4a47ee74718a22e963e8a647c8c3bfe8bb05c"
}
],
"title": "wifi: mac80211: check S1G action frame size",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-53257",
"datePublished": "2025-09-15T14:46:29.009Z",
"dateReserved": "2025-09-15T14:19:21.850Z",
"dateUpdated": "2026-08-05T09:13:19.341Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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