{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50531", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:15:38.664Z", "datePublished": "2025-10-07T15:19:21.911Z", "dateUpdated": "2026-05-11T19:21:13.642Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:21:13.642Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix an information leak in tipc_topsrv_kern_subscr\n\nUse a 8-byte write to initialize sub.usr_handle in\ntipc_topsrv_kern_subscr(), otherwise four bytes remain uninitialized\nwhen issuing setsockopt(..., SOL_TIPC, ...).\nThis resulted in an infoleak reported by KMSAN when the packet was\nreceived:\n\n =====================================================\n BUG: KMSAN: kernel-infoleak in copyout+0xbc/0x100 lib/iov_iter.c:169\n instrument_copy_to_user ./include/linux/instrumented.h:121\n copyout+0xbc/0x100 lib/iov_iter.c:169\n _copy_to_iter+0x5c0/0x20a0 lib/iov_iter.c:527\n copy_to_iter ./include/linux/uio.h:176\n simple_copy_to_iter+0x64/0xa0 net/core/datagram.c:513\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419\n skb_copy_datagram_iter+0x58/0x200 net/core/datagram.c:527\n skb_copy_datagram_msg ./include/linux/skbuff.h:3903\n packet_recvmsg+0x521/0x1e70 net/packet/af_packet.c:3469\n ____sys_recvmsg+0x2c4/0x810 net/socket.c:?\n ___sys_recvmsg+0x217/0x840 net/socket.c:2743\n __sys_recvmsg net/socket.c:2773\n __do_sys_recvmsg net/socket.c:2783\n __se_sys_recvmsg net/socket.c:2780\n __x64_sys_recvmsg+0x364/0x540 net/socket.c:2780\n do_syscall_x64 arch/x86/entry/common.c:50\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd arch/x86/entry/entry_64.S:120\n\n ...\n\n Uninit was stored to memory at:\n tipc_sub_subscribe+0x42d/0xb50 net/tipc/subscr.c:156\n tipc_conn_rcv_sub+0x246/0x620 net/tipc/topsrv.c:375\n tipc_topsrv_kern_subscr+0x2e8/0x400 net/tipc/topsrv.c:579\n tipc_group_create+0x4e7/0x7d0 net/tipc/group.c:190\n tipc_sk_join+0x2a8/0x770 net/tipc/socket.c:3084\n tipc_setsockopt+0xae5/0xe40 net/tipc/socket.c:3201\n __sys_setsockopt+0x87f/0xdc0 net/socket.c:2252\n __do_sys_setsockopt net/socket.c:2263\n __se_sys_setsockopt net/socket.c:2260\n __x64_sys_setsockopt+0xe0/0x160 net/socket.c:2260\n do_syscall_x64 arch/x86/entry/common.c:50\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd arch/x86/entry/entry_64.S:120\n\n Local variable sub created at:\n tipc_topsrv_kern_subscr+0x57/0x400 net/tipc/topsrv.c:562\n tipc_group_create+0x4e7/0x7d0 net/tipc/group.c:190\n\n Bytes 84-87 of 88 are uninitialized\n Memory access of size 88 starts at ffff88801ed57cd0\n Data copied to user address 0000000020000400\n ...\n =====================================================" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/topsrv.c" ], "versions": [ { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "3d1b83ff7b6575a4e41283203e6b2e25ea700cd7", "status": "affected", "versionType": "git" }, { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "567f8de358b61015dcfb8878a1f06c5369a45f54", "status": "affected", "versionType": "git" }, { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "e558e148938442dd49628cd7ef61c360832bef31", "status": "affected", "versionType": "git" }, { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "dbc01c0a4e202a7e925dad1d4b7c1d6eb0c81154", "status": "affected", "versionType": "git" }, { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "fef70f978bc289642501d88d2a3f5e841bd31a67", "status": "affected", "versionType": "git" }, { "version": "026321c6d056a54b4145522492245d2b5913ee1d", "lessThan": "777ecaabd614d47c482a5c9031579e66da13989a", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/topsrv.c" ], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.264", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.221", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.152", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.76", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.6", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "4.19.264" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.4.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.152" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.76" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.0.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3d1b83ff7b6575a4e41283203e6b2e25ea700cd7" }, { "url": "https://git.kernel.org/stable/c/567f8de358b61015dcfb8878a1f06c5369a45f54" }, { "url": "https://git.kernel.org/stable/c/e558e148938442dd49628cd7ef61c360832bef31" }, { "url": "https://git.kernel.org/stable/c/dbc01c0a4e202a7e925dad1d4b7c1d6eb0c81154" }, { "url": "https://git.kernel.org/stable/c/fef70f978bc289642501d88d2a3f5e841bd31a67" }, { "url": "https://git.kernel.org/stable/c/777ecaabd614d47c482a5c9031579e66da13989a" } ], "title": "tipc: fix an information leak in tipc_topsrv_kern_subscr", "x_generator": { "engine": "bippy-1.2.0" } } } }