FKIE_CVE-2026-72226
Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-10-16 19:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: tt: prevent TVLV OOB check overflow
A TT unicast TVLV contains the number of VLANs stored in it. This number is
an u16 and gets multiplied by the size of the struct
batadv_tvlv_tt_vlan_data (8 bytes). The size can therefore overflow the u16
used to store the tt_vlan_len. All additional safety checks to prevent
out-of-bounds access of the TVLV buffer are invalid due to this overflow.
Using size_t prevents this overflow and ensures that the safety checks
compare against the actual buffer requirements.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/batman-adv/translation-table.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0de12a4c4847f571d82a9cd96bc633eded41d7c6",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "d6ff4764ff784ede25f5c83a6f5883a74c93a5ea",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "1898273c5dc8148267ef9f97cd2517a2822350e7",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "604bd5042fbcd1ab9f7cd98fd847ec017aeede8a",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "7319c0794f91be2734aac695794e7203606b49f8",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "3256c05d5a9db34346eaf20f52dddde984852d77",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "6222b443686525cb5a9b6a9cecf23b2e2ab23e2a",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
},
{
"lessThan": "7a581d9aaba8c82bd6177fa36b2588eea77f6e2b",
"status": "affected",
"version": "7ea7b4a142758deaf46c1af0ca9ceca6dd55138b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/batman-adv/translation-table.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"lessThan": "3.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tt: prevent TVLV OOB check overflow\n\nA TT unicast TVLV contains the number of VLANs stored in it. This number is\nan u16 and gets multiplied by the size of the struct\nbatadv_tvlv_tt_vlan_data (8 bytes). The size can therefore overflow the u16\nused to store the tt_vlan_len. All additional safety checks to prevent\nout-of-bounds access of the TVLV buffer are invalid due to this overflow.\n\nUsing size_t prevents this overflow and ensures that the safety checks\ncompare against the actual buffer requirements."
}
],
"id": "CVE-2026-72226",
"lastModified": "2026-10-16T19:17:15.187",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-72226",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T18:44:17.010963Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-15T06:21:49.383",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0de12a4c4847f571d82a9cd96bc633eded41d7c6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1898273c5dc8148267ef9f97cd2517a2822350e7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3256c05d5a9db34346eaf20f52dddde984852d77"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/604bd5042fbcd1ab9f7cd98fd847ec017aeede8a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6222b443686525cb5a9b6a9cecf23b2e2ab23e2a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7319c0794f91be2734aac695794e7203606b49f8"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7a581d9aaba8c82bd6177fa36b2588eea77f6e2b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d6ff4764ff784ede25f5c83a6f5883a74c93a5ea"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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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.
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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.
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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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