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vuln-cve/data/2025/40xxx/CVE-2025-40282.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-40282",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T07:20:57.184Z",
"datePublished": "2025-12-06T21:51:06.287Z",
"dateUpdated": "2026-08-05T12:09:12.019Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:09:12.019Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: 6lowpan: reset link-local header on ipv6 recv path\n\nBluetooth 6lowpan.c netdev has header_ops, so it must set link-local\nheader for RX skb, otherwise things crash, eg. with AF_PACKET SOCK_RAW\n\nAdd missing skb_reset_mac_header() for uncompressed ipv6 RX path.\n\nFor the compressed one, it is done in lowpan_header_decompress().\n\nLog: (BlueZ 6lowpan-tester Client Recv Raw - Success)\n------\nkernel BUG at net/core/skbuff.c:212!\nCall Trace:\n<IRQ>\n...\npacket_rcv (net/packet/af_packet.c:2152)\n...\n<TASK>\n__local_bh_enable_ip (kernel/softirq.c:407)\nnetif_rx (net/core/dev.c:5648)\nchan_recv_cb (net/bluetooth/6lowpan.c:294 net/bluetooth/6lowpan.c:359)\n------"
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - The malicious frame arrives over a Bluetooth LE L2CAP IPSP channel handled by chan_recv_cb()/recv_pkt(), so the attacker must be within BLE radio range of the target.\nAC:L - The attacker fully controls the trigger — the 6lowpan dispatch byte (0x41) selects the vulnerable uncompressed-IPv6 branch deterministically, with no race, no memory-layout dependency, and no retry needed.\nPR:N - The IPSP listening channel is created with sec_level BT_SECURITY_LOW on BDADDR_ANY, and smp_sufficient_security() short-circuits to true for that level, so an unpaired, unauthenticated peer can connect and send the frame.\nUI:N - No victim action is needed; the packet is processed in softirq context on receipt, and the ndisc/eth_hdr() consumer path is driven entirely by the attacker's own frames.\nS:U - The corruption and its consequences stay within the kernel's own security authority — no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - skb_mac_header() resolves to skb->head + 0xFFFF, giving unbounded out-of-bounds reads — eth_hdr(skb)->h_source in ndisc_recv_na() leaks kernel heap bytes into dmesg, and the ~4 GiB skb->data underflow with inflated skb->len exposes arbitrary kernel memory in paths that do not BUG() first.\nI:H - skb_push()/__skb_push() write a wildly out-of-range skb->data and a massively inflated skb->len before any validation; in the generic-XDP path __skb_push() has no bounds check at all, so the corrupted geometry feeds pskb_expand_head()/skb_linearize() and yields out-of-bounds writes.\nA:H - The reported outcome is a hard kernel BUG() in skb_under_panic() at net/core/skbuff.c:212 taken in IRQ/softirq context, which is a fatal exception in interrupt — an immediate, remotely repeatable kernel panic."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bluetooth/6lowpan.c"
],
"versions": [
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "ea46a1d217bc82e01cf3d0424e50ebfe251e34bf",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "973e0271754c77db3e1b6b69adf2de85a79a4c8b",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "d566e9a2bfc848941b091ffd5f4e12c4e889d818",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "4ebb90c3c309e6375dc3e841af92e2a039843e62",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "c24ac6cfe4f9a47180a65592c47e7a310d2f9d93",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "11cd7e068381666f842ad41d1cc58eecd0c75237",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "70d84e7c3a44b81020a3c3d650a64c63593405bd",
"status": "affected",
"versionType": "git"
},
{
"version": "18722c247023035b9e2e2a08a887adec2a9a6e49",
"lessThan": "3b78f50918276ab28fb22eac9aa49401ac436a3b",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bluetooth/6lowpan.c"
],
"versions": [
{
"version": "3.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.14",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.302",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.247",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.197",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.159",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.117",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.59",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.17.9",
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18",
"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": "3.14",
"versionEndExcluding": "5.4.302"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "5.10.247"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "5.15.197"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "6.1.159"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "6.6.117"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "6.12.59"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "6.17.9"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14",
"versionEndExcluding": "6.18"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/ea46a1d217bc82e01cf3d0424e50ebfe251e34bf"
},
{
"url": "https://git.kernel.org/stable/c/973e0271754c77db3e1b6b69adf2de85a79a4c8b"
},
{
"url": "https://git.kernel.org/stable/c/d566e9a2bfc848941b091ffd5f4e12c4e889d818"
},
{
"url": "https://git.kernel.org/stable/c/4ebb90c3c309e6375dc3e841af92e2a039843e62"
},
{
"url": "https://git.kernel.org/stable/c/c24ac6cfe4f9a47180a65592c47e7a310d2f9d93"
},
{
"url": "https://git.kernel.org/stable/c/11cd7e068381666f842ad41d1cc58eecd0c75237"
},
{
"url": "https://git.kernel.org/stable/c/70d84e7c3a44b81020a3c3d650a64c63593405bd"
},
{
"url": "https://git.kernel.org/stable/c/3b78f50918276ab28fb22eac9aa49401ac436a3b"
}
],
"title": "Bluetooth: 6lowpan: reset link-local header on ipv6 recv path",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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