282 lines
15 KiB
JSON
282 lines
15 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-2026-52995",
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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": "2026-06-09T07:44:35.377Z",
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"datePublished": "2026-06-24T16:29:08.229Z",
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"dateUpdated": "2026-11-06T16:23:53.125Z"
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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": "2026-06-24T16:29:08.229Z"
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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/rds: zero per-item info buffer before handing it to visitors\n\nrds_for_each_conn_info() and rds_walk_conn_path_info() both hand a\ncaller-allocated on-stack u64 buffer to a per-connection visitor and\nthen copy the full item_len bytes back to user space via\nrds_info_copy() regardless of how much of the buffer the visitor\nactually wrote.\n\nrds_ib_conn_info_visitor() and rds6_ib_conn_info_visitor() only\nwrite a subset of their output struct when the underlying\nrds_connection is not in state RDS_CONN_UP (src/dst addr, tos, sl\nand the two GIDs via explicit memsets). Several u32 fields\n(max_send_wr, max_recv_wr, max_send_sge, rdma_mr_max, rdma_mr_size,\ncache_allocs) and the 2-byte alignment hole between sl and\ncache_allocs remain as whatever stack contents preceded the visitor\ncall and are then memcpy_to_user()'d out to user space.\n\nstruct rds_info_rdma_connection and struct rds6_info_rdma_connection\nare the only rds_info_* structs in include/uapi/linux/rds.h that are\nnot marked __attribute__((packed)), so they have a real alignment\nhole. The other info visitors (rds_conn_info_visitor,\nrds6_conn_info_visitor, rds_tcp_tc_info, ...) write all fields of\ntheir packed output struct today and are not known to be vulnerable,\nbut a future visitor that adds a conditional write-path would have\nthe same bug.\n\nReproduction on a kernel built without CONFIG_INIT_STACK_ALL_ZERO=y:\na local unprivileged user opens AF_RDS, sets SO_RDS_TRANSPORT=IB,\nbinds to a local address on an RDMA-capable netdev (rxe soft-RoCE on\nany netdev is sufficient), sendto()'s any peer on the same subnet\n(fails cleanly but installs an rds_connection in the global hash in\nRDS_CONN_CONNECTING), then calls getsockopt(SOL_RDS,\nRDS_INFO_IB_CONNECTIONS). The returned 68-byte item contains 26\nbytes of stack garbage including kernel text/data pointers:\n\n 0..7 0a 63 00 01 0a 63 00 02 src=10.99.0.1 dst=10.99.0.2\n 8..39 00 ... gids (memset-zeroed)\n 40..47 e0 92 a3 81 ff ff ff ff kernel pointer (max_send_wr)\n 48..55 7f 37 b5 81 ff ff ff ff kernel pointer (rdma_mr_max)\n 56..59 01 00 08 00 rdma_mr_size (garbage)\n 60..61 00 00 tos, sl\n 62..63 00 00 alignment padding\n 64..67 18 00 00 00 cache_allocs (garbage)\n\nFix by zeroing the per-item buffer in both rds_for_each_conn_info()\nand rds_walk_conn_path_info() before invoking the visitor. This\ncovers the IPv4/IPv6 IB visitors and hardens all current and future\nvisitors against the same class of bug.\n\nNo functional change for visitors that fully populate their output.\n\nChanges in v2:\n- retarget at the net tree (subject prefix \"[PATCH net v2]\",\n net/rds: prefix in the title)\n- pick up Reviewed-by tags from Sharath Srinivasan and\n Allison Henderson"
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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/rds/connection.c"
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],
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"versions": [
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{
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"version": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "81651e9d7dea1c048d2952f57632a042931d7b43",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "0797b2e6901827694aa9c34c4c72118c8c97fba1",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "5e67cc262afb384e835c3327e9d954eeaedc6a87",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "b6ba93a7b71ed443c9843eb12d27ed86f1e52694",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "c7cb9eed8215a790f052f49cdccf577720d2bb62",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "91ce1bb6e4194dc2321748f68145359dcf86e350",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "912ba2e5704fdb8bc5decda96dfc1a57838f0099",
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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": "ec16227e14141e4fd7ae76354c09dadfe2449d9e",
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"lessThan": "c88eb7e8d8397a8c1db59c425332c5a30b2a1682",
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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/rds/connection.c"
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],
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"versions": [
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{
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"version": "2.6.30",
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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": "2.6.30",
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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": "5.10.258",
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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": "5.15.209",
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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": "6.1.175",
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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": "6.6.141",
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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": "6.12.91",
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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": "6.18.33",
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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": "7.0.10",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "2.6.30",
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"versionEndExcluding": "5.10.258"
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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": "2.6.30",
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"versionEndExcluding": "5.15.209"
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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": "2.6.30",
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"versionEndExcluding": "6.1.175"
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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": "2.6.30",
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"versionEndExcluding": "6.6.141"
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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": "2.6.30",
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"versionEndExcluding": "6.12.91"
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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": "2.6.30",
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"versionEndExcluding": "6.18.33"
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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": "2.6.30",
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"versionEndExcluding": "7.0.10"
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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": "2.6.30",
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"versionEndExcluding": "7.1"
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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/81651e9d7dea1c048d2952f57632a042931d7b43"
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},
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{
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"url": "https://git.kernel.org/stable/c/0797b2e6901827694aa9c34c4c72118c8c97fba1"
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},
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{
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"url": "https://git.kernel.org/stable/c/5e67cc262afb384e835c3327e9d954eeaedc6a87"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6ba93a7b71ed443c9843eb12d27ed86f1e52694"
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},
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{
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"url": "https://git.kernel.org/stable/c/c7cb9eed8215a790f052f49cdccf577720d2bb62"
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},
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{
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"url": "https://git.kernel.org/stable/c/91ce1bb6e4194dc2321748f68145359dcf86e350"
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},
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{
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"url": "https://git.kernel.org/stable/c/912ba2e5704fdb8bc5decda96dfc1a57838f0099"
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},
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{
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"url": "https://git.kernel.org/stable/c/c88eb7e8d8397a8c1db59c425332c5a30b2a1682"
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}
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],
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"title": "net/rds: zero per-item info buffer before handing it to visitors",
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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-2026-52995",
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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": "2026-11-06T16:15:59.094455Z"
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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": "2026-11-06T16:23:53.125Z"
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}
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}
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]
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}
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} |