248 lines
13 KiB
JSON
248 lines
13 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-2026-93048",
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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": "2026-09-17T15:57:05.658Z",
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"datePublished": "2026-09-17T16:10:39.008Z",
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"dateUpdated": "2026-10-19T09:04:43.363Z"
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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": "2026-10-19T09:04:43.363Z"
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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\nmtd: part: reject MTDPART_OFS_RETAIN in mtd_add_partition()\n\nmtd_add_partition() does not reject the special offset value\nMTDPART_OFS_RETAIN (-3), which leads to a WARN_ON in\nadd_mtd_device() when called through the BLKPG ioctl on NAND\ndevices. The RETAIN value depends on cur_offset being the end of\nthe previous partition, but in the dynamic partition path\ncur_offset equals the offset argument itself, causing undefined\nbehavior.\n\nCommit 5daa7b21496a (\"mtd: prepare partition add and del functions\nfor ioctl requests\") introduced mtd_add_partition() and correctly\nrejected MTDPART_OFS_APPEND (-1) and MTDPART_OFS_NXTBLK (-2),\nsince those special offsets rely on cur_offset tracking the\nprevious partition's end. However, commit 1a31368bf92e (\"mtd: add a flags\nfor partitions which should just leave smth. after them\")\nlater added MTDPART_OFS_RETAIN (-3) for the static\npartition table path without updating mtd_add_partition() to\nalso reject this value.\n\nWith offset=-3 passed via BLKPG, the RETAIN size calculation in\nallocate_partition() underflows (parent_size - 0xFFFFFFFFFFFFFFFD\n= parent_size + 3). If the underflow result does not appear to\nleave enough space, allocate_partition() jumps to out_register via\ngoto, skipping erasesize initialization. This results in\nerasesize=0, which triggers:\n\nWARN_ON((!mtd->erasesize || !master->_erase) &&\n\t\t!(mtd->flags & MTD_NO_ERASE))\n\nin add_mtd_device(). If the underflow result appears to leave\nenough space, a bogus partition size is calculated, but the\n\"out of reach\" sanity check catches the invalid offset and\ncreates a disabled empty partition (offset=0, size=0) instead\nof returning an error.\n\nFix this by adding MTDPART_OFS_RETAIN to the rejection list in\nmtd_add_partition(), consistent with the existing handling of\nAPPEND and NXTBLK."
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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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"drivers/mtd/mtdpart.c"
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],
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"versions": [
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{
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"version": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "701c3ae7273e1adc20db5d97c42e0139b479f16b",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "6aaab2ace3f7b55733d904e5549acf8405f03642",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "181c1bff940e7d3e34ca485d37e3cdbfe409203c",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "a536eb57be58442b19398b2783071007ecfb1735",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "e204e5c49a012f99638633fdbd773e3c86260053",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "398aca2f90122d5abbabff1079deaeb885fe9e40",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "c645f6dd1af2ecc70fd3578e141f2f71fa9e4eff",
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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": "1a31368bf92ef2a7da3ba379672c405bd2751df9",
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"lessThan": "b759d5bb6265419344ee9729fd0dc07ad85719d8",
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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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"drivers/mtd/mtdpart.c"
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],
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"versions": [
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{
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"version": "3.2",
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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": "3.2",
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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": "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": "3.2",
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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": "3.2",
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"versionEndExcluding": "5.15.221"
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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": "3.2",
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"versionEndExcluding": "6.1.188"
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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": "3.2",
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"versionEndExcluding": "6.6.157"
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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": "3.2",
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"versionEndExcluding": "6.12.110"
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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": "3.2",
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"versionEndExcluding": "6.18.52"
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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": "3.2",
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"versionEndExcluding": "7.2.6"
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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": "3.2",
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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/701c3ae7273e1adc20db5d97c42e0139b479f16b"
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},
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{
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"url": "https://git.kernel.org/stable/c/6aaab2ace3f7b55733d904e5549acf8405f03642"
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},
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{
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"url": "https://git.kernel.org/stable/c/181c1bff940e7d3e34ca485d37e3cdbfe409203c"
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},
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{
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"url": "https://git.kernel.org/stable/c/a536eb57be58442b19398b2783071007ecfb1735"
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},
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{
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"url": "https://git.kernel.org/stable/c/e204e5c49a012f99638633fdbd773e3c86260053"
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},
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{
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"url": "https://git.kernel.org/stable/c/398aca2f90122d5abbabff1079deaeb885fe9e40"
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},
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{
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"url": "https://git.kernel.org/stable/c/c645f6dd1af2ecc70fd3578e141f2f71fa9e4eff"
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},
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{
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"url": "https://git.kernel.org/stable/c/b759d5bb6265419344ee9729fd0dc07ad85719d8"
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}
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],
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"title": "mtd: part: reject MTDPART_OFS_RETAIN in mtd_add_partition()",
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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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} |