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-2026-98252",
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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": "2026-09-25T10:25:14.331Z",
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"datePublished": "2026-10-06T08:45:19.393Z",
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"dateUpdated": "2026-10-19T09:16:23.591Z"
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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": "2026-10-19T09:16:23.591Z"
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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\nRDMA/core: fix refcount bug in iwpm_get_nlmsg_request()\n\niwpm_get_nlmsg_request() initializes refcount _after_ list_add_tail()\nmaking it accessible to global list where another CPU can kref_get()\non nlmsg_request causing a refcount \"addition on 0\" bug. Fix this\nby initializing kref _before_ list_add_tail() so refcount for\nnlmsg_request can be incremented/decremented normally. In addition,\nalso initialize every field before list_add_tail()."
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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:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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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 triggering input is a forged IWPM reply (e.g. RDMA_NL_IWPM_REG_PID) sent over a local NETLINK_RDMA socket to iwcm_nl_cb_table callbacks, which call iwpm_find_nlmsg_request(). No remote protocol carries it, and rdma_nl_rcv_msg() rejects RDMA_NL_IWCM messages from outside init_net.\nAC:H - The forged reply must land in the few-instruction gap between list_add_tail() and kref_init()/sema_init() in iwpm_get_nlmsg_request(). The host also needs an iWARP device so that iw_cm_map() sends port-mapper requests, and the attacker cannot set that up.\nPR:L - No iwcm_nl_cb_table entry sets RDMA_NL_ADMIN_PERM, and the NETLINK_RDMA socket uses NL_CFG_F_NONROOT_RECV, so an unprivileged user in the initial netns can join RDMA_NL_GROUP_IWPM, read the sequence numbers and send replies. A local login is still needed.\nUI:N - The attacker sends the netlink replies and starts iWARP connection setup without any action from another user.\nS:U - The memory corruption stays inside the kernel's own security authority. No guest/host or IOMMU boundary is crossed.\nC:H - kref_init() erases the reference taken by iwpm_find_nlmsg_request(), so the requester's kref_put() in iwpm_wait_complete_req() can free the kmalloc'd iwpm_nlmsg_request while iwpm_register_pid_cb() still uses it. That is a use-after-free that can be reclaimed by sprayed data.\nI:H - After the early free, the callback's up(&nlmsg_request->sem) and the requester's down_timeout() write a semaphore inside a freed and possibly reclaimed slab object. That is a use-after-free write on heap memory.\nA:H - The race fires a refcount_t 'addition on 0' WARN (a panic under panic_on_warn), and the replies can dereference NULL req_buffer in iwpm_register_pid_cb() or touch freed memory, either of which oopses the kernel."
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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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"drivers/infiniband/core/iwpm_util.c"
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],
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"versions": [
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{
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"version": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "52c13c63bb3662c108244e7447055e30bf40244e",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "8a91609032d47e77bcb37bc8f6e88d89340d2709",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "ce8a379598bd4058081416abea4279fd05a95374",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "88e429a4e9bac3d2138011c5ca06254331f2587f",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "e15eb536be4f646ce683d2867572b2200be877f7",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "117871cdb8927542abd7b65ce5995bf0265a8c05",
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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": "30dc5e63d6a5ad24894b5512d10b228d73645a44",
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"lessThan": "33fb59da49c4c3f5c2ec9f9d4447a56857a02c02",
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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/infiniband/core/iwpm_util.c"
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],
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"versions": [
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{
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"version": "3.16",
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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": "3.16",
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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": "5.10.271",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.18.54",
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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": "7.2.8",
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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": "3.16",
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"versionEndExcluding": "5.10.271"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/52c13c63bb3662c108244e7447055e30bf40244e"
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},
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{
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"url": "https://git.kernel.org/stable/c/8a91609032d47e77bcb37bc8f6e88d89340d2709"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce8a379598bd4058081416abea4279fd05a95374"
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},
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{
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"url": "https://git.kernel.org/stable/c/2fbac8a56004b6ce54fbfe845d4b25da6e0b55e8"
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},
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{
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"url": "https://git.kernel.org/stable/c/88e429a4e9bac3d2138011c5ca06254331f2587f"
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},
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{
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"url": "https://git.kernel.org/stable/c/e15eb536be4f646ce683d2867572b2200be877f7"
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},
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{
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"url": "https://git.kernel.org/stable/c/117871cdb8927542abd7b65ce5995bf0265a8c05"
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},
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{
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"url": "https://git.kernel.org/stable/c/33fb59da49c4c3f5c2ec9f9d4447a56857a02c02"
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}
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],
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"title": "RDMA/core: fix refcount bug in iwpm_get_nlmsg_request()",
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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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} |