CVE-2026-46198 (GCVE-0-2026-46198)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
batman-adv: fix integer overflow on buff_pos
Summary
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: fix integer overflow on buff_pos
Fixing an integer overflow present in batadv_iv_ogm_send_to_if. The size
check is done using the int type in batadv_iv_ogm_aggr_packet whereas the
buff_pos variable uses the s16 type. This could lead to an out-of-bound
read.
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 867cd090760e8f5cd206f387b47ff9c56fac04e9
(git)
Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 10bb1f366d884d506c38a947b43026a75d1afe9a (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 96c9c0ed9a9579a9085765aceaa4556a6666eb82 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < f61499359fa529f0d45a53bf7c573a49eb6322e6 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 974542d1efc48b7e9fe16184e647615cba39969b (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < bf872db54f91ffe70104b98c20068b2d5910e018 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < b252797bfced986d6d92ec2f4cfcca842ce8aa78 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 0799e5943611006b346b8813c7daf7dd5aa26bfd (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.38
Unaffected: 0 , < 2.6.38 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
{
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"programFiles": [
"net/batman-adv/bat_iv_ogm.c"
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},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"version": "5.10.258",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.15.209",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver"
},
{
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"version": "6.6.140",
"versionType": "semver"
},
{
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"version": "6.12.90",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.32",
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},
{
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"status": "unaffected",
"version": "7.0.9",
"versionType": "semver"
},
{
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"version": "7.1",
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}
]
}
],
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix integer overflow on buff_pos\n\nFixing an integer overflow present in batadv_iv_ogm_send_to_if. The size\ncheck is done using the int type in batadv_iv_ogm_aggr_packet whereas the\nbuff_pos variable uses the s16 type. This could lead to an out-of-bound\nread."
}
],
"metrics": [
{
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - batman-adv OGMs are layer-2 mesh management frames received from neighboring mesh nodes; they are not IP-routable, so an attacker must be on the same mesh/L2 (WiFi/Ethernet) segment.\nAC:L - The attacker fully controls the crafted OGM\u0027s size and tvlv_len, and in a mesh deployed over a large-MTU interface (required for packet_len\u003e32767) can reliably and repeatedly trigger the overflow; the negative-offset check passes for nearly all values.\nPR:N - batman-adv performs no authentication of OGMs; any node on the mesh can broadcast frames that the victim node automatically processes and forwards.\nUI:N - Received OGMs are parsed, forwarded and aggregated entirely by the kernel without any user action.\nS:U - The out-of-bounds read/write corrupts kernel memory within the same kernel security authority; no boundary (VM/IOMMU) is crossed.\nC:H - The wrapped negative buff_pos causes reads of kernel memory before/around the skb buffer (tvlv_len and OGM fields), an out-of-bounds read of attacker-influenced kernel memory.\nI:H - The loop body writes ogm-\u003eflags (set/clear BATADV_DIRECTLINK) at an attacker-influenced negative offset from skb-\u003edata, an out-of-bounds write giving a memory-corruption primitive.\nA:H - Continued iteration over wild pointers dereferences out-of-bounds/unmapped memory, reliably causing a kernel oops/panic."
}
]
}
],
"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/867cd090760e8f5cd206f387b47ff9c56fac04e9"
},
{
"url": "https://git.kernel.org/stable/c/10bb1f366d884d506c38a947b43026a75d1afe9a"
},
{
"url": "https://git.kernel.org/stable/c/96c9c0ed9a9579a9085765aceaa4556a6666eb82"
},
{
"url": "https://git.kernel.org/stable/c/f61499359fa529f0d45a53bf7c573a49eb6322e6"
},
{
"url": "https://git.kernel.org/stable/c/974542d1efc48b7e9fe16184e647615cba39969b"
},
{
"url": "https://git.kernel.org/stable/c/bf872db54f91ffe70104b98c20068b2d5910e018"
},
{
"url": "https://git.kernel.org/stable/c/b252797bfced986d6d92ec2f4cfcca842ce8aa78"
},
{
"url": "https://git.kernel.org/stable/c/0799e5943611006b346b8813c7daf7dd5aa26bfd"
}
],
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"cveId": "CVE-2026-46198",
"datePublished": "2026-05-28T09:40:14.558Z",
"dateReserved": "2026-05-13T15:03:33.104Z",
"dateUpdated": "2026-08-05T12:30:22.970Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
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"date": "2026-09-14",
"epss": "0.00281",
"percentile": "0.20563"
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"id": "msrc_CVE-2026-46198",
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"product_status:fixed": "1",
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"source": "Microsoft CSAF VEX",
"status": "final",
"title": "batman-adv: fix integer overflow on buff_pos",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46198.json",
"version": "3"
},
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This could lead to an 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T07:41:27+00:00",
"cve": "CVE-2026-46198",
"id": "CVE-2026-46198",
"initial_release_date": "2026-05-28T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: batman-adv: fix integer overflow on buff_pos",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46198.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:11:16Z",
"cve": "CVE-2026-46198",
"id": "CVE-2026-46198",
"initial_release_date": "2026-05-29T01:15:20Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "703",
"product_status:known_not_affected": "17",
"product_status:recommended": "254",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46198",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46198.json",
"version": "12"
}
}
}
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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.
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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