In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: avoid overflows in nft_hash_buckets() Number of
buckets being stored in 32bit variables, we have to ensure that no
overflows occur in nft_hash_buckets() syzbot injected a size == 0x40000000
and reported: UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13
shift exponent 64 is too large for 64-bit type ‘long unsigned int’ CPU: 1
PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a
lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181
lib/ubsan.c:327 __roundup_pow_of_two include/linux/log2.h:57 [inline]
nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]
nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652
nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]
nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322
nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488
nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]
nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120
net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350
___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0
net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-80.90 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1054.57 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws-hwe | < 4.15.0-1109.116~16.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1055.57 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-azure | < 4.15.0-1121.134~14.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | < 4.15.0-1121.134~16.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-4.15 | < any | UNKNOWN |
git.kernel.org/linus/a54754ec9891830ba548e2010c889e3c8146e449 (5.13-rc1)
git.kernel.org/stable/c/1e8ab479cfbe5751efccedb95afb9b112a5ba475
git.kernel.org/stable/c/2824cafc6a93792d9ad85939c499161214d84c4b
git.kernel.org/stable/c/72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7
git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b
git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449
git.kernel.org/stable/c/c77e2ef18167ad334e27610ced9a7f6af5ec1787
git.kernel.org/stable/c/efcd730ddd6f25578bd31bfe703e593e2421d708
launchpad.net/bugs/cve/CVE-2021-46992
nvd.nist.gov/vuln/detail/CVE-2021-46992
security-tracker.debian.org/tracker/CVE-2021-46992
www.cve.org/CVERecord?id=CVE-2021-46992