{"id":"CVE-2021-46992","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nftables: avoid overflows in nft_hash_buckets()\n\nNumber of buckets being stored in 32bit variables, we have to\nensure that no overflows occur in nft_hash_buckets()\n\nsyzbot injected a size == 0x40000000 and reported:\n\nUBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13\nshift exponent 64 is too large for 64-bit type 'long unsigned int'\nCPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nCall Trace:\n __dump_stack lib/dump_stack.c:79 [inline]\n dump_stack+0x141/0x1d7 lib/dump_stack.c:120\n ubsan_epilogue+0xb/0x5a lib/ubsan.c:148\n __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327\n __roundup_pow_of_two include/linux/log2.h:57 [inline]\n nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]\n nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652\n nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]\n nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322\n nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\n sock_sendmsg_nosec net/socket.c:654 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:674\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\n do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46","modified":"2026-03-13T05:20:27.259276Z","published":"2024-02-28T09:15:37.833Z","related":["SUSE-SU-2024:0925-1","SUSE-SU-2024:0975-1","SUSE-SU-2024:0976-1","SUSE-SU-2024:1454-1","SUSE-SU-2024:1465-1","SUSE-SU-2024:1489-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449"},{"type":"FIX","url":"https://git.kernel.org/stable/c/c77e2ef18167ad334e27610ced9a7f6af5ec1787"},{"type":"FIX","url":"https://git.kernel.org/stable/c/efcd730ddd6f25578bd31bfe703e593e2421d708"},{"type":"FIX","url":"https://git.kernel.org/stable/c/1e8ab479cfbe5751efccedb95afb9b112a5ba475"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2824cafc6a93792d9ad85939c499161214d84c4b"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46992.json","unresolved_ranges":[{"events":[{"introduced":"4.9"},{"fixed":"4.14.233"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.191"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.120"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.38"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.11.22"}]},{"events":[{"introduced":"5.12"},{"fixed":"5.12.5"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}