248 lines
12 KiB
JSON
248 lines
12 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-2026-74694",
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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": "2026-08-15T05:44:03.926Z",
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"datePublished": "2026-08-22T15:32:57.113Z",
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"dateUpdated": "2026-08-22T15:32:57.113Z"
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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": "2026-08-22T15:32:57.113Z"
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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\nnet/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length\n\nncsi_send_cmd_nl() takes the number of bytes to copy from the\nattacker-controlled ncsi_pkt_hdr.length field of the in-band packet\nheader, while the source buffer is the NCSI_ATTR_DATA netlink\nattribute whose readable size is nla_len() - sizeof(ncsi_pkt_hdr).\nThe two length sources are never cross-checked: only\nnla_len() >= sizeof(struct ncsi_pkt_hdr) is enforced.\n\nWith hdr->length set larger than the attribute payload (up to 65535\nagainst at most 2032 readable bytes), ncsi_cmd_handler_oem() copies\npast the end of the netlink attribute buffer with unsafe_memcpy(),\nleaking up to ~64KB of kernel heap memory into the transmitted NCSI\ncommand packet. The destination skb is sized by the declared payload,\nso the write side does not overflow - this is a pure OOB read /\ninformation leak, reachable with CAP_NET_ADMIN on systems with a\nregistered NCSI device (e.g. OpenBMC on Aspeed BMC SoCs, where\nNET_NCSI=y is standard).\n\nReject commands whose declared payload extends past the end of the\ndata attribute.\n\nThe issue was found by the autokbug dynamic kernel fuzzer at Tencent\nYunding Lab."
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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/ncsi/ncsi-netlink.c"
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],
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"versions": [
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{
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"version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "e60afa01d35f8b2671b27ca93309921427144cce",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "67c72b8ef63d9d9a610546fda30b116638f39745",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "4489b4a17892750131e4bef4bc1d3d703c8fb5ba",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "43c7d0a6917751ea898ae584d00f24f5deac46d4",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "b5231ad0b376b801ab8cf2962b182cc29deaedb3",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "02226af69362758046822840fc6a497f5de33f00",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "3a60b5af75abe8e3494ccd074fb4ae6e601a3e55",
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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": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
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"lessThan": "afa58b7384913c8773d837acdb07b035690ec5d2",
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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/ncsi/ncsi-netlink.c"
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],
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"versions": [
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{
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"version": "4.20",
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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": "4.20",
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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": "5.10.265",
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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": "5.15.216",
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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": "6.1.183",
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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": "6.6.152",
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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": "6.12.104",
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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": "6.18.45",
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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": "7.1.9",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "4.20",
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"versionEndExcluding": "5.10.265"
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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": "4.20",
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"versionEndExcluding": "5.15.216"
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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": "4.20",
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"versionEndExcluding": "6.1.183"
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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": "4.20",
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"versionEndExcluding": "6.6.152"
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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": "4.20",
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"versionEndExcluding": "6.12.104"
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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": "4.20",
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"versionEndExcluding": "6.18.45"
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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": "4.20",
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"versionEndExcluding": "7.1.9"
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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": "4.20",
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"versionEndExcluding": "7.2"
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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/e60afa01d35f8b2671b27ca93309921427144cce"
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},
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{
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"url": "https://git.kernel.org/stable/c/67c72b8ef63d9d9a610546fda30b116638f39745"
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},
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{
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"url": "https://git.kernel.org/stable/c/4489b4a17892750131e4bef4bc1d3d703c8fb5ba"
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},
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{
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"url": "https://git.kernel.org/stable/c/43c7d0a6917751ea898ae584d00f24f5deac46d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/b5231ad0b376b801ab8cf2962b182cc29deaedb3"
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},
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{
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"url": "https://git.kernel.org/stable/c/02226af69362758046822840fc6a497f5de33f00"
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},
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{
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"url": "https://git.kernel.org/stable/c/3a60b5af75abe8e3494ccd074fb4ae6e601a3e55"
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},
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{
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"url": "https://git.kernel.org/stable/c/afa58b7384913c8773d837acdb07b035690ec5d2"
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}
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],
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"title": "net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length",
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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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} |