264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90225",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.794Z",
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"datePublished": "2026-09-17T16:07:34.658Z",
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"dateUpdated": "2026-10-19T09:00:01.803Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:00:01.803Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: read llcp_sock->local under the socket lock in getsockopt\n\nnfc_llcp_getsockopt() read llcp_sock->local before lock_sock(sk) and\nthen dereferenced the cached pointer inside the locked region.\nllcp_sock_bind() assigns and clears llcp_sock->local under the same\nsocket lock, dropping the last reference on its error path. A\ngetsockopt() racing an in-flight bind() can observe the pointer, block\non lock_sock(), and then dereference a freed nfc_llcp_local once bind()\nhas unwound.\n\nMove the llcp_sock->local read and the NULL check inside the\nlock_sock(sk) region so bind() cannot mutate or free the pointer between\nthe load and the use."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The UAF is triggered by racing local syscalls on an AF_NFC LLCP socket: getsockopt(2) (__sys_getsockopt → do_sock_getsockopt → nfc_llcp_getsockopt) against bind(2) (__sys_bind → llcp_sock_bind). No LLCP PDU or other NFC-peer bytes are consumed on this path, so an adjacent radio peer cannot drive it.\nAC:L - The attacker owns both sides of the lock_sock(sk) race: one thread calls bind() with service_name_len 0 so nfc_llcp_get_sdp_ssap() returns LLCP_SAP_MAX after llcp_sock->local is stored, and another calls getsockopt(SOL_NFC, NFC_LLCP_RW) on the same socket, which used to snapshot that pointer before taking the lock.\nPR:L - llcp_sock_create() checks capable(CAP_NET_RAW) only for SOCK_RAW; nfc_llcp_getsockopt is on llcp_sock_ops for SOCK_STREAM/DGRAM. An unprivileged user in init_net can socket(AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP) then bind/getsockopt. nfc_llcp_find_local() needs a registered NFC device, which is typical on phones.\nUI:N - The attacker creates the AF_NFC LLCP socket and issues bind() and getsockopt() on that fd themselves; no other user needs to tap a tag, mount media, or accept a connection.\nS:U - The freed object is the host kernel's kmalloc'd nfc_llcp_local used by nfc_llcp_getsockopt(); impact stays inside the kernel's security authority, not a VM, IOMMU, or sandbox escape.\nC:H - nfc_llcp_getsockopt() dereferences the dangling nfc_llcp_local to read local->rw, local->miux, local->remote_miu, and local->remote_lto and copies those values to userspace with put_user(), so reclaim of the freed slab yields an arbitrary-read primitive.\nI:H - llcp_sock_bind()'s sock_llcp_put_local path drops nfc_llcp_local via nfc_llcp_local_put() while nfc_llcp_getsockopt() still holds the pointer; reclaiming that kmalloc object with attacker-controlled data turns the dangling local into a write/control-flow primitive.\nA:H - Using the freed nfc_llcp_local in nfc_llcp_getsockopt() (the local->rw and local->remote_lto loads) is a kernel slab UAF that oopses or panics on KASAN/SLUB_DEBUG and can crash the system even when not fully exploited."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/nfc/llcp_sock.c"
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],
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"versions": [
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "56fd158fef20268f48db6cdfe5d722e930134eda",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "8ba8cec0586727cc135ca4827921fc7b52946d71",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "ed5240bab3468988077fe8bf29b935eaecc9ff89",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "fe65727a4a21b11c18eebae1338482767a897b76",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "2d8ac24565be85bf56580b87bf1b874d35625eb5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "156e65bd29307f5053835bff60bc1ba342fa010f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "d1b73962675cdc5a58e2707e25b548d8b495fde0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "26fd76cab2e61cedc5c25f7151fb31b57ddc53c7",
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"lessThan": "36812527052c5bfb1ec6c1e292d67a5bf76b750f",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/nfc/llcp_sock.c"
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],
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"versions": [
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{
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"version": "3.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.10",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "5.10.270"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "6.1.188"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "6.6.157"
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "6.12.110"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "7.2.6"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.10",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/56fd158fef20268f48db6cdfe5d722e930134eda"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ba8cec0586727cc135ca4827921fc7b52946d71"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed5240bab3468988077fe8bf29b935eaecc9ff89"
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},
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{
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"url": "https://git.kernel.org/stable/c/fe65727a4a21b11c18eebae1338482767a897b76"
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},
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{
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"url": "https://git.kernel.org/stable/c/2d8ac24565be85bf56580b87bf1b874d35625eb5"
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},
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{
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"url": "https://git.kernel.org/stable/c/156e65bd29307f5053835bff60bc1ba342fa010f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d1b73962675cdc5a58e2707e25b548d8b495fde0"
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},
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{
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"url": "https://git.kernel.org/stable/c/36812527052c5bfb1ec6c1e292d67a5bf76b750f"
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}
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],
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"title": "nfc: llcp: read llcp_sock->local under the socket lock in getsockopt",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |