242 lines
12 KiB
JSON
242 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-2026-64458",
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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": "2026-07-19T15:36:31.789Z",
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"datePublished": "2026-07-25T08:51:26.072Z",
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"dateUpdated": "2026-11-06T16:44:52.652Z"
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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": "2026-08-17T04:56:02.857Z"
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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\nmm/damon/ops-common: handle extreme intervals in damon_hot_score()\n\nFix three issues in damon_hot_score() that comes from wrong handling of\nextreme (zero or too high) monitoring intervals user setup.\n\nWhen the user sets sampling interval zero, damon_max_nr_accesses(), which\nis called from damon_hot_score(), causes a divide-by-zero. Needless to\nsay, it is a problem.\n\nWhen the user sets the aggregation interval zero, the function returns\nzero. It is wrong, since the real maximum nr_acceses in the setup should\nbe one. Worse yet, it can cause another divide-by-zero from its caller,\ndamon_hot_score(), since it uses damon_max_nr_accesses() return value as a\ndenominator.\n\nWhen the user sets the aggregation interval very high, damon_hot_score()\ncould return a value out of [0, DAMOS_MAX_SCORE] range. Since the return\nvalue is used as an index to the regions_score_histogram array, which is\nDAMOS_MAX_SCORE+1 size, it causes out of bounds array access.\n\nThe issues can be relatively easily reproduced like below. The sysfs\nwrite permission is required, though.\n\n # ./damo start --damos_action lru_prio --damos_quota_space 100M \\\n --damos_quota_interval 1s\n # cd /sys/kernel/mm/damon/admin/kdamonds/0\n # echo 0 > contexts/0/monitoring_attrs/intervals/sample_us\n # echo 0 > contexts/0/monitoring_attrs/intervals/aggr_us\n # echo commit > state\n # dmesg\n [...]\n [ 131.329762] Oops: divide error: 0000 [#1] SMP NOPTI\n [...]\n [ 131.336089] RIP: 0010:damon_hot_score+0x27/0xd0\n [...]\n\nFix the divide-by-zero intervals problems by explicitly handling the zero\nintervals in damon_max_nr_accesses(). Fix the out-of-bound array access\nby applying [0, DAMOS_MAX_SCORE] bounds before returning from\ndamon_hot_score().\n\nThe issue was discovered [1] by Sashiko."
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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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"include/linux/damon.h",
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"mm/damon/ops-common.c"
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],
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"versions": [
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{
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"version": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "58321b4e6e4f0f412069ab27ccdd56292757343a",
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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": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "74fef68d521150281e36cdaa20e9e1ee3e3aa146",
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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": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "ef2ae10a4582bc92b7e944181bbd2f87f3d30f3a",
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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": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "9c8f31eaae6140ecadec0c07320498a944556de2",
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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": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "76e415ea88d20f022ed5cfcf78c50e156a267e91",
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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": "198f0f4c58b9f481e4e51c8c70a6ab9852bbab7f",
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"lessThan": "35d4a3cf70a855b50e53189ac2f8463e20a02046",
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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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"include/linux/damon.h",
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"mm/damon/ops-common.c"
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],
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"versions": [
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{
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"version": "5.16",
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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": "5.16",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.96",
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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": "6.18.39",
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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": "7.1.4",
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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": "5.16",
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"versionEndExcluding": "6.1.178"
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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": "5.16",
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"versionEndExcluding": "6.6.145"
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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": "5.16",
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"versionEndExcluding": "6.12.96"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.16",
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"versionEndExcluding": "6.18.39"
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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": "5.16",
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"versionEndExcluding": "7.1.4"
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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": "5.16",
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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/58321b4e6e4f0f412069ab27ccdd56292757343a"
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},
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{
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"url": "https://git.kernel.org/stable/c/74fef68d521150281e36cdaa20e9e1ee3e3aa146"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef2ae10a4582bc92b7e944181bbd2f87f3d30f3a"
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},
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{
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"url": "https://git.kernel.org/stable/c/9c8f31eaae6140ecadec0c07320498a944556de2"
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},
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{
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"url": "https://git.kernel.org/stable/c/76e415ea88d20f022ed5cfcf78c50e156a267e91"
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},
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{
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"url": "https://git.kernel.org/stable/c/35d4a3cf70a855b50e53189ac2f8463e20a02046"
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}
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],
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"title": "mm/damon/ops-common: handle extreme intervals in damon_hot_score()",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-64458",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:38:57.314626Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T16:44:52.652Z"
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}
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}
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]
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}
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} |