5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_limit: avoid possible divide error in nft_limit_init
div_u64() divides u64 by u32. nft_limit_init() wants to divide u64 by u64,
use the appropriate math function (div64_u64) divide error: 0000 [#1]
PREEMPT SMP KASAN CPU: 1 PID: 8390 Comm: syz-executor188 Not tainted
5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google
Compute Engine, BIOS Google 01/01/2011 RIP: 0010:div_u64_rem
include/linux/math64.h:28 [inline] RIP: 0010:div_u64
include/linux/math64.h:127 [inline] RIP: 0010:nft_limit_init+0x2a2/0x5e0
net/netfilter/nft_limit.c:85 Code: ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38
a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45 89 ed 31
d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00
00 00 RSP: 0018:ffffc90009447198 EFLAGS: 00010246 RAX: 0000000000000000
RBX: 0000200000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI:
ffffffff875152e6 RDI: 0000000000000003 RBP: ffff888020f80908 R08:
0000200000000000 R09: 0000000000000000 R10: ffffffff875152d8 R11:
0000000000000000 R12: ffffc90009447270 R13: 0000000000000000 R14:
0000000000000000 R15: 0000000000000000 FS: 000000000097a300(0000)
GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000
CR0: 0000000080050033 CR2: 00000000200001c4 CR3: 0000000026a52000 CR4:
00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400 Call Trace: nf_tables_newexpr
net/netfilter/nf_tables_api.c:2675 [inline] nft_expr_init+0x145/0x2d0
net/netfilter/nf_tables_api.c:2713 nft_set_elem_expr_alloc+0x27/0x280
net/netfilter/nf_tables_api.c:5160 nf_tables_newset+0x1997/0x3150
net/netfilter/nf_tables_api.c:4321 nfnetlink_rcv_batch+0x85a/0x21b0
net/netfilter/nfnetlink.c:456 nfnetlink_rcv_skb_batch
net/netfilter/nfnetlink.c:580 [inline] nfnetlink_rcv+0x3af/0x420
net/netfilter/nfnetlink.c:598 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 entry_SYSCALL_64_after_hwframe+0x44/0xae
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-74.83 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1049.51 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws-hwe | < 4.15.0-1106.113~16.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1048.50 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-azure | < 4.15.0-1118.131~14.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | < 4.15.0-1118.131~16.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-4.15 | < any | UNKNOWN |
git.kernel.org/linus/b895bdf5d643b6feb7c60856326dd4feb6981560 (5.12-rc8)
git.kernel.org/stable/c/01fb1626b620cb37a65ad08e0f626489e8f042ef
git.kernel.org/stable/c/1bb3ee4259936cc3b2d80a4a480bbb4868575071
git.kernel.org/stable/c/9065ccb9ec92c5120e7e97958397ebdb454f23d6
git.kernel.org/stable/c/b895bdf5d643b6feb7c60856326dd4feb6981560
git.kernel.org/stable/c/dc1732baa9da5b68621586bf8636ebbc27dc62d2
git.kernel.org/stable/c/fadd3c4afdf3d4c21f4d138502f8b76334987e26
launchpad.net/bugs/cve/CVE-2021-46915
nvd.nist.gov/vuln/detail/CVE-2021-46915
security-tracker.debian.org/tracker/CVE-2021-46915
www.cve.org/CVERecord?id=CVE-2021-46915
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%