CVE-2025-68362 (GCVE-0-2025-68362)
Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-05-11 21:51
VLAI
EPSS
VEX
Title
wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()
The rtl8187_rx_cb() calculates the rx descriptor header address
by subtracting its size from the skb tail pointer.
However, it does not validate if the received packet
(skb->len from urb->actual_length) is large enough to contain this
header.
If a truncated packet is received, this will lead to a buffer
underflow, reading memory before the start of the skb data area,
and causing a kernel panic.
Add length checks for both rtl8187 and rtl8187b descriptor headers
before attempting to access them, dropping the packet cleanly if the
check fails.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < 118e12bf3e4288cf845cd3759bd9d4c99f91aab5
(git)
Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < 6a96bd0d94305fd04a6ac64446ec113bae289384 (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < e2f3ea15e804607e0a4a34a2f6c331c8750b68bc (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < dc153401fb26c1640a2b279c47b65e1c416af276 (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < 4758770a673c60d8f615809304d72e1432fa6355 (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < 638d4148e166d114a4cd7becaae992ce1a815ed8 (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < 5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15 (git) Affected: 6f7853f3cbe457067e9fe05461f56c7ea4ac488c , < b647d2574e4583c2e3b0ab35568f60c88e910840 (git) |
|
| Linux | Linux |
Affected:
2.6.27
Unaffected: 0 , < 2.6.27 (semver) Unaffected: 5.10.248 , ≤ 5.10.* (semver) Unaffected: 5.15.198 , ≤ 5.15.* (semver) Unaffected: 6.1.160 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.63 , ≤ 6.12.* (semver) Unaffected: 6.17.13 , ≤ 6.17.* (semver) Unaffected: 6.18.2 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()\n\nThe rtl8187_rx_cb() calculates the rx descriptor header address\nby subtracting its size from the skb tail pointer.\nHowever, it does not validate if the received packet\n(skb-\u003elen from urb-\u003eactual_length) is large enough to contain this\nheader.\n\nIf a truncated packet is received, this will lead to a buffer\nunderflow, reading memory before the start of the skb data area,\nand causing a kernel panic.\n\nAdd length checks for both rtl8187 and rtl8187b descriptor headers\nbefore attempting to access them, dropping the packet cleanly if the\ncheck fails."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:51:44.272Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
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"url": "https://git.kernel.org/stable/c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5"
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{
"url": "https://git.kernel.org/stable/c/6a96bd0d94305fd04a6ac64446ec113bae289384"
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{
"url": "https://git.kernel.org/stable/c/e2f3ea15e804607e0a4a34a2f6c331c8750b68bc"
},
{
"url": "https://git.kernel.org/stable/c/dc153401fb26c1640a2b279c47b65e1c416af276"
},
{
"url": "https://git.kernel.org/stable/c/4758770a673c60d8f615809304d72e1432fa6355"
},
{
"url": "https://git.kernel.org/stable/c/638d4148e166d114a4cd7becaae992ce1a815ed8"
},
{
"url": "https://git.kernel.org/stable/c/5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15"
},
{
"url": "https://git.kernel.org/stable/c/b647d2574e4583c2e3b0ab35568f60c88e910840"
}
],
"title": "wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()",
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"datePublished": "2025-12-24T10:32:50.492Z",
"dateReserved": "2025-12-16T14:48:05.307Z",
"dateUpdated": "2026-05-11T21:51:44.272Z",
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"date": "2026-10-14",
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()\n\nThe rtl8187_rx_cb() calculates the rx descriptor header address\nby subtracting its size from the skb tail pointer.\nHowever, it does not validate if the received packet\n(skb-\u003elen from urb-\u003eactual_length) is large enough to contain this\nheader.\n\nIf a truncated packet is received, this will lead to a buffer\nunderflow, reading memory before the start of the skb data area,\nand causing a kernel panic.\n\nAdd length checks for both rtl8187 and rtl8187b descriptor headers\nbefore attempting to access them, dropping the packet cleanly if the\ncheck fails."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: rtl818x: rtl8187: Correcci\u00f3n de un posible desbordamiento negativo de b\u00fafer en rtl8187_rx_cb()\n\nLa funci\u00f3n rtl8187_rx_cb() calcula la direcci\u00f3n de la cabecera del descriptor rx restando su tama\u00f1o del puntero de cola del skb. Sin embargo, no valida si el paquete recibido (skb -\u003e len de urb -\u003e actual_length) es lo suficientemente grande para contener esta cabecera.\n\nSi se recibe un paquete truncado, esto conducir\u00e1 a un desbordamiento negativo de b\u00fafer, leyendo memoria antes del inicio del \u00e1rea de datos del skb, y causando un kernel panic.\n\nA\u00f1adir comprobaciones de longitud para las cabeceras de descriptor tanto de rtl8187 como de rtl8187b antes de intentar acceder a ellas, descartando el paquete limpiamente si la comprobaci\u00f3n falla."
}
],
"id": "CVE-2025-68362",
"lastModified": "2026-10-13T11:10:00.203",
"metrics": {},
"published": "2025-12-24T11:15:59.593",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5"
},
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},
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T01:43:45+00:00",
"cve": "CVE-2025-68362",
"id": "CVE-2025-68362",
"initial_release_date": "2025-12-24T00:00:00+00:00",
"product_status:known_affected": "28",
"product_status:known_not_affected": "246",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68362.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-10T01:40:01Z",
"cve": "CVE-2025-68362",
"id": "CVE-2025-68362",
"initial_release_date": "2025-12-25T00:24:25Z",
"product_status:known_affected": "726",
"product_status:known_not_affected": "52",
"product_status:recommended": "413",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-68362",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68362.json",
"version": "40"
}
}
}
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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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