{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: br_netfilter: skip conntrack input hook for promisc packets\n\nFor historical reasons, when bridge device is in promisc mode, packets\nthat are directed to the taps follow bridge input hook path. This patch\nadds a workaround to reset conntrack for these packets.\n\nJianbo Liu reports warning splats in their test infrastructure where\ncloned packets reach the br_netfilter input hook to confirm the\nconntrack object.\n\nScratch one bit from BR_INPUT_SKB_CB to annotate that this packet has\nreached the input hook because it is passed up to the bridge device to\nreach the taps.\n\n[ 57.571874] WARNING: CPU: 1 PID: 0 at net/bridge/br_netfilter_hooks.c:616 br_nf_local_in+0x157/0x180 [br_netfilter]\n[ 57.572749] Modules linked in: xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat xt_addrtype xt_conntrack nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_isc si ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5ctl mlx5_core\n[ 57.575158] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0+ #19\n[ 57.575700] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[ 57.576662] RIP: 0010:br_nf_local_in+0x157/0x180 [br_netfilter]\n[ 57.577195] Code: fe ff ff 41 bd 04 00 00 00 be 04 00 00 00 e9 4a ff ff ff be 04 00 00 00 48 89 ef e8 f3 a9 3c e1 66 83 ad b4 00 00 00 04 eb 91 <0f> 0b e9 f1 fe ff ff 0f 0b e9 df fe ff ff 48 89 df e8 b3 53 47 e1\n[ 57.578722] RSP: 0018:ffff88885f845a08 EFLAGS: 00010202\n[ 57.579207] RAX: 0000000000000002 RBX: ffff88812dfe8000 RCX: 0000000000000000\n[ 57.579830] RDX: ffff88885f845a60 RSI: ffff8881022dc300 RDI: 0000000000000000\n[ 57.580454] RBP: ffff88885f845a60 R08: 0000000000000001 R09: 0000000000000003\n[ 57.581076] R10: 00000000ffff1300 R11: 0000000000000002 R12: 0000000000000000\n[ 57.581695] R13: ffff8881047ffe00 R14: ffff888108dbee00 R15: ffff88814519b800\n[ 57.582313] FS: 0000000000000000(0000) GS:ffff88885f840000(0000) knlGS:0000000000000000\n[ 57.583040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 57.583564] CR2: 000000c4206aa000 CR3: 0000000103847001 CR4: 0000000000370eb0\n[ 57.584194] DR0: 0000000000000000 DR1: 0000000000000000 DR2:\n0000000000000000\n[ 57.584820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:\n0000000000000400\n[ 57.585440] Call Trace:\n[ 57.585721] \n[ 57.585976] ? __warn+0x7d/0x130\n[ 57.586323] ? br_nf_local_in+0x157/0x180 [br_netfilter]\n[ 57.586811] ? report_bug+0xf1/0x1c0\n[ 57.587177] ? handle_bug+0x3f/0x70\n[ 57.587539] ? exc_invalid_op+0x13/0x60\n[ 57.587929] ? asm_exc_invalid_op+0x16/0x20\n[ 57.588336] ? br_nf_local_in+0x157/0x180 [br_netfilter]\n[ 57.588825] nf_hook_slow+0x3d/0xd0\n[ 57.589188] ? br_handle_vlan+0x4b/0x110\n[ 57.589579] br_pass_frame_up+0xfc/0x150\n[ 57.589970] ? br_port_flags_change+0x40/0x40\n[ 57.590396] br_handle_frame_finish+0x346/0x5e0\n[ 57.590837] ? ipt_do_table+0x32e/0x430\n[ 57.591221] ? br_handle_local_finish+0x20/0x20\n[ 57.591656] br_nf_hook_thresh+0x4b/0xf0 [br_netfilter]\n[ 57.592286] ? br_handle_local_finish+0x20/0x20\n[ 57.592802] br_nf_pre_routing_finish+0x178/0x480 [br_netfilter]\n[ 57.593348] ? br_handle_local_finish+0x20/0x20\n[ 57.593782] ? nf_nat_ipv4_pre_routing+0x25/0x60 [nf_nat]\n[ 57.594279] br_nf_pre_routing+0x24c/0x550 [br_netfilter]\n[ 57.594780] ? br_nf_hook_thresh+0xf0/0xf0 [br_netfilter]\n[ 57.595280] br_handle_frame+0x1f3/0x3d0\n[ 57.595676] ? br_handle_local_finish+0x20/0x20\n[ 57.596118] ? br_handle_frame_finish+0x5e0/0x5e0\n[ 57.596566] __netif_receive_skb_core+0x25b/0xfc0\n[ 57.597017] ? __napi_build_skb+0x37/0x40\n[ 57.597418] __netif_receive_skb_list_core+0xfb/0x220" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bridge/br_input.c", "net/bridge/br_netfilter_hooks.c", "net/bridge/br_private.h", "net/bridge/netfilter/nf_conntrack_bridge.c" ], "versions": [ { "version": "7c3f28599652", "lessThan": "dceb683ab87c", "status": "affected", "versionType": "git" }, { "version": "2b1414d5e94e", "lessThan": "b13db0d16bc7", "status": "affected", "versionType": "git" }, { "version": "80cd0487f630", "lessThan": "3f59ac29dea0", "status": "affected", "versionType": "git" }, { "version": "62e7151ae3eb", "lessThan": "43193174510e", "status": "affected", "versionType": "git" }, { "version": "62e7151ae3eb", "lessThan": "751de2012eaf", "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/bridge/br_input.c", "net/bridge/br_netfilter_hooks.c", "net/bridge/br_private.h", "net/bridge/netfilter/nf_conntrack_bridge.c" ], "versions": [ { "version": "6.8", "status": "affected" }, { "version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.157", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.88", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.29", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8.8", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/dceb683ab87ca3666a9bb5c0158528b646faedc4" }, { "url": "https://git.kernel.org/stable/c/b13db0d16bc7b2a52abcf5cb71334f63faa5dbd6" }, { "url": "https://git.kernel.org/stable/c/3f59ac29dea0921637053908fe99268d157bbb9d" }, { "url": "https://git.kernel.org/stable/c/43193174510ea4f3ce09b796e559a2fd9f148615" }, { "url": "https://git.kernel.org/stable/c/751de2012eafa4d46d8081056761fa0e9cc8a178" } ], "title": "netfilter: br_netfilter: skip conntrack input hook for promisc packets", "x_generator": { "engine": "bippy-a5840b7849dd" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2024-27018", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }