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vuln-cve/data/2026/80xxx/CVE-2026-80599.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-80599",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-26T14:34:25.771Z",
"datePublished": "2026-08-28T06:48:26.709Z",
"dateUpdated": "2026-10-16T19:26:29.749Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-29T06:21:11.082Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: ensure accessible eth_hdr proto field\n\nWhen batadv_get_vid() accesses the proto field of the ethernet header, it\nis not checking if the data itself is accessible. The caller is responsible\nfor it. But in contrast to other call sites, batadv_dat_get_vid() and its\ncaller didn't make sure this is true. This could have caused an\nout-of-bounds access."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"baseScore": 8.1,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - Exploitation requires injecting crafted ETH_P_BATMAN frames on the victim's batman-adv hard interface via batadv_batman_skb_recv(); an attacker must be on the same L2 mesh segment (WiFi community mesh, industrial mesh, or shared Ethernet backbone), not arbitrary Internet routing.\nAC:L - The attacker fully controls remote packet length and contents; sending a batman-adv unicast or broadcast frame with only the batman header (10 or 14 bytes) and no embedded Ethernet payload bypasses hdr_size-only pskb_may_pull checks and deterministically forces the h_proto read past skb->tail without races or rare configuration.\nPR:N - No Linux account or capability on the victim is required; any unauthenticated mesh peer that can transmit ETH_P_BATMAN frames to an active batman-adv node with Distributed ARP Table enabled reaches batadv_dat_snoop_incoming_*() through the normal RX handler without local login or CAP_NET_ADMIN on the target.\nUI:N - The vulnerable path runs automatically in softirq when the mesh interface receives qualifying traffic; no victim mount, click, or administrative action is needed beyond batman-adv already running with DAT enabled (the default at mesh interface creation).\nS:U - Impact is an out-of-bounds kernel read during batman-adv packet processing on the receiving mesh node; it does not cross a VM, container, or IOMMU security boundary to affect a different authority's resources.\nC:H - batadv_get_vid() reads ethhdr->h_proto (2 bytes at offset 12 within the embedded Ethernet header) without ensuring hdr_size+ETH_HLEN bytes are accessible, causing an out-of-bounds read of adjacent skb tailroom or slab memory beyond the packet buffer per kernel OOB-read guidance.\nI:N - This is an out-of-bounds read only with no memory write or corruption; subsequent batadv_arp_get_type() performs its own pskb_may_pull() before further parsing, and the DAT snoop path returns without modifying kernel structures beyond the illicit read.\nA:H - Reading past skb->tail in NET_RX_SOFTIRQ can provoke a kernel oops or panic when the access crosses an unmapped page boundary, denying mesh and host connectivity; any out-of-bounds kernel access on the packet receive path is rated high availability impact."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/batman-adv/distributed-arp-table.c",
"net/batman-adv/main.c"
],
"versions": [
{
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"status": "affected",
"versionType": "git"
},
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"status": "affected",
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{
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"lessThan": "4407ff3af469356f9641c4a6e7072309bae86bea",
"status": "affected",
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},
{
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"lessThan": "26560c4a03dc4d607331600c187f59ab2df5f341",
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}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/batman-adv/distributed-arp-table.c",
"net/batman-adv/main.c"
],
"versions": [
{
"version": "3.13",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.13",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.261",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.212",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.178",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.145",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.97",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.13",
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},
{
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/da3677b5ed362742d30ceab31bfafcdc74dc2642"
},
{
"url": "https://git.kernel.org/stable/c/6d3ea37074bb747f745d28138f87745ba9bd97c5"
},
{
"url": "https://git.kernel.org/stable/c/7913935d41f166c367bbf7cc76a79e50044388e8"
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{
"url": "https://git.kernel.org/stable/c/3c62694c31f043568c3f4784b8d247cc3bea6b4c"
},
{
"url": "https://git.kernel.org/stable/c/5836a050d02e9598fa0f71e88dde28b63dfa35e3"
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{
"url": "https://git.kernel.org/stable/c/8f76277d02176cd739945bba3379448e2e22e799"
},
{
"url": "https://git.kernel.org/stable/c/4407ff3af469356f9641c4a6e7072309bae86bea"
},
{
"url": "https://git.kernel.org/stable/c/26560c4a03dc4d607331600c187f59ab2df5f341"
}
],
"title": "batman-adv: dat: ensure accessible eth_hdr proto field",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-80599",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T19:18:22.359068Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-16T19:26:29.749Z"
}
}
]
}
}
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