CVE-2021-46992
- Source
- https://cve.org/CVERecord?id=CVE-2021-46992
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46992.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-46992
- Downstream
- Related
- Published
- 2024-02-28T09:15:37.833Z
- Modified
- 2026-03-13T05:20:27.259276Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: avoid overflows in nfthashbuckets()
Number of buckets being stored in 32bit variables, we have to ensure that no overflows occur in nfthashbuckets()
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: __dumpstack lib/dumpstack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dumpstack.c:120 ubsanepilogue+0xb/0x5a lib/ubsan.c:148 __ubsanhandleshift_outofbounds.cold+0xb1/0x181 lib/ubsan.c:327 __rounduppowoftwo include/linux/log2.h:57 [inline] nfthashbuckets net/netfilter/nftsethash.c:411 [inline] nfthashestimate.cold+0x19/0x1e net/netfilter/nftsethash.c:652 nftselectsetops net/netfilter/nftablesapi.c:3586 [inline] nftablesnewset+0xe62/0x3110 net/netfilter/nftablesapi.c:4322 nfnetlinkrcvbatch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488 nfnetlinkrcvskbbatch net/netfilter/nfnetlink.c:612 [inline] nfnetlinkrcv+0x3af/0x420 net/netfilter/nfnetlink.c:630 netlinkunicastkernel net/netlink/afnetlink.c:1312 [inline] netlinkunicast+0x533/0x7d0 net/netlink/afnetlink.c:1338 netlinksendmsg+0x856/0xd90 net/netlink/afnetlink.c:1927 socksendmsgnosec net/socket.c:654 [inline] socksendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 _syssendmsg+0xe5/0x1b0 net/socket.c:2433 dosyscall64+0x2d/0x70 arch/x86/entry/common.c:46
- References
-
- https://git.kernel.org/stable/c/72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7
- https://git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b
- https://git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449
- https://git.kernel.org/stable/c/c77e2ef18167ad334e27610ced9a7f6af5ec1787
- https://git.kernel.org/stable/c/efcd730ddd6f25578bd31bfe703e593e2421d708
- https://git.kernel.org/stable/c/1e8ab479cfbe5751efccedb95afb9b112a5ba475
- https://git.kernel.org/stable/c/2824cafc6a93792d9ad85939c499161214d84c4b
Affected packages
Git /
Database specific
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"
}
]
}
]
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46992.json"