{"cve":{"cve_id":"CVE-2026-52995","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"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","published_at":"2026-06-24T16:29:08.229000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/81651e9d7dea1c048d2952f57632a042931d7b43","https://git.kernel.org/stable/c/0797b2e6901827694aa9c34c4c72118c8c97fba1","https://git.kernel.org/stable/c/5e67cc262afb384e835c3327e9d954eeaedc6a87","https://git.kernel.org/stable/c/b6ba93a7b71ed443c9843eb12d27ed86f1e52694","https://git.kernel.org/stable/c/c7cb9eed8215a790f052f49cdccf577720d2bb62","https://git.kernel.org/stable/c/91ce1bb6e4194dc2321748f68145359dcf86e350","https://git.kernel.org/stable/c/912ba2e5704fdb8bc5decda96dfc1a57838f0099","https://git.kernel.org/stable/c/c88eb7e8d8397a8c1db59c425332c5a30b2a1682"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:22.518073Z","updated_at":"2026-06-28T23:30:49.890169Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"81651e9d7dea1c048d2952f57632a042931d7b43","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:81651e9d7dea1c048d2952f57632a042931d7b43"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"0797b2e6901827694aa9c34c4c72118c8c97fba1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:0797b2e6901827694aa9c34c4c72118c8c97fba1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"5e67cc262afb384e835c3327e9d954eeaedc6a87","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:5e67cc262afb384e835c3327e9d954eeaedc6a87"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"b6ba93a7b71ed443c9843eb12d27ed86f1e52694","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:b6ba93a7b71ed443c9843eb12d27ed86f1e52694"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"c7cb9eed8215a790f052f49cdccf577720d2bb62","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:c7cb9eed8215a790f052f49cdccf577720d2bb62"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"91ce1bb6e4194dc2321748f68145359dcf86e350","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:91ce1bb6e4194dc2321748f68145359dcf86e350"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"912ba2e5704fdb8bc5decda96dfc1a57838f0099","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:912ba2e5704fdb8bc5decda96dfc1a57838f0099"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ec16227e14141e4fd7ae76354c09dadfe2449d9e","version_start_inclusive":true,"version_end":"c88eb7e8d8397a8c1db59c425332c5a30b2a1682","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ec16227e14141e4fd7ae76354c09dadfe2449d9e:c88eb7e8d8397a8c1db59c425332c5a30b2a1682"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.30","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.30:2.6.30"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:2.6.30"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.258","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.258:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.209","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.209:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.141","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.141:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/81651e9d7dea1c048d2952f57632a042931d7b43","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/0797b2e6901827694aa9c34c4c72118c8c97fba1","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5e67cc262afb384e835c3327e9d954eeaedc6a87","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/b6ba93a7b71ed443c9843eb12d27ed86f1e52694","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c7cb9eed8215a790f052f49cdccf577720d2bb62","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/91ce1bb6e4194dc2321748f68145359dcf86e350","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/912ba2e5704fdb8bc5decda96dfc1a57838f0099","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c88eb7e8d8397a8c1db59c425332c5a30b2a1682","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:29:08.229000Z","label":"CVE published","source":null}]}