234 lines
12 KiB
JSON
234 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-2026-98629",
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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": "2026-09-25T10:25:14.361Z",
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"datePublished": "2026-10-18T15:19:50.589Z",
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"dateUpdated": "2026-10-19T09:22:57.219Z"
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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": "2026-10-19T09:22:57.219Z"
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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/sched: cls_u32: fix manual hash table handle IDR aliasing\n\nA u32 hash table created with an explicit handle ('tc filter add ...\nhandle 801: u32 divisor N') keys its IDR entry on the raw handle, while\nthe destroy paths free it under handle2id(handle). The two key domains\ndisagree for handles in the 0x800..0xFFF htid range:\nhandle2id() folds them back into the auto-allocated id space (1..0x7FF).\n\nA manual table therefore leaves its raw-keyed IDR entry unreachable on\ndelete (a permanent leak), and its delete can drop the idr entry of an\nunrelated live auto table. A later auto allocation can then hand out a\nhandle that aliases the live manual table; u32_lookup_ht() first-match\nroutes lookups and TCA_U32_LINK for that htid to the wrong table.\n\nKey the divisor-path alloc on handle2id(handle) so allocation and\nremoval share one key domain. A manual handle that maps onto an id\nalready in use is rejected with -ENOSPC, and auto allocation skips ids\nheld by live manual tables.\n\nConditions to recreate:\n ip link add test0 type dummy\n tc qdisc add dev test0 clsact\n tc filter add dev test0 ingress protocol ip pref 1 \\\n handle 801: u32 divisor 16\n tc filter add dev test0 ingress protocol ip pref 2 u32 divisor 16\n tc -d filter show dev test0 ingress | grep 'fh 801:'\n # unpatched: two live tables with handle 0x80100000 (the pref 2 root\n # hnode is auto-allocated id 1); patched: the auto hnode takes id 2.\n\nAlso tested with a poc with a live u32 table on the block, add/delete a manual\ntable 'handle 901: u32 divisor 1' twice; unpatched, the re-add fails with\n-ENOSPC because the raw key leaked on the first delete."
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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/sched/cls_u32.c"
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],
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"versions": [
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{
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"version": "9b2c3184e126b941dfa716b8128ed6db92a64e2f",
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"lessThan": "21fc07924e996e1e661268ca269c86b8d59d25b3",
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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": "789f9963bd031c3a185605665b744912df8e7eda",
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"lessThan": "0fac292d93fdb313099e98cce928b3a524c92c94",
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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": "73af53d82076bbe184d9ece9e14b0dc8599e6055",
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"lessThan": "54a454c5e41f5e2cb70c8163140ce095c5d5eefd",
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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": "73af53d82076bbe184d9ece9e14b0dc8599e6055",
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"lessThan": "f6696481eedfd5752b4b56eed715d0b0fe48b9c5",
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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": "73af53d82076bbe184d9ece9e14b0dc8599e6055",
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"lessThan": "2f898f9ec7c73c5697ee462681e7ea6984ee1f3d",
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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": "73af53d82076bbe184d9ece9e14b0dc8599e6055",
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"lessThan": "0a5f5d9e94dead312d32c366b917c64e552b72f7",
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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": "4403f9293ce9ecc2a55c688d84ee37e3ba0fc1a8",
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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": "6.1.119",
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"lessThan": "6.1.189",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.63",
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"lessThan": "6.6.158",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.11.10",
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"lessThan": "6.12",
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"status": "affected",
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"versionType": "semver"
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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/sched/cls_u32.c"
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],
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"versions": [
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{
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"version": "6.12",
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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": "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": "6.1.189",
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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": "6.6.158",
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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": "6.12.112",
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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": "6.18.55",
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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": "7.2.9",
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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": "6.1.119",
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"versionEndExcluding": "6.1.189"
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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": "6.6.63",
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"versionEndExcluding": "6.6.158"
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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": "6.12",
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"versionEndExcluding": "6.12.112"
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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": "6.12",
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"versionEndExcluding": "6.18.55"
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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": "6.12",
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"versionEndExcluding": "7.2.9"
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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": "6.12",
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"versionEndExcluding": "7.3"
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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": "6.11.10"
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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/21fc07924e996e1e661268ca269c86b8d59d25b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/0fac292d93fdb313099e98cce928b3a524c92c94"
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},
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{
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"url": "https://git.kernel.org/stable/c/54a454c5e41f5e2cb70c8163140ce095c5d5eefd"
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},
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{
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"url": "https://git.kernel.org/stable/c/f6696481eedfd5752b4b56eed715d0b0fe48b9c5"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f898f9ec7c73c5697ee462681e7ea6984ee1f3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/0a5f5d9e94dead312d32c366b917c64e552b72f7"
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}
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],
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"title": "net/sched: cls_u32: fix manual hash table handle IDR aliasing",
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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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} |