CVE-2021-47591
- Source
- https://cve.org/CVERecord?id=CVE-2021-47591
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47591.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47591
- Downstream
- Related
- Published
- 2024-06-19T15:15:53.700Z
- Modified
- 2026-03-10T23:51:41.733069Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mptcp: remove tcp ulp setsockopt support
TCP_ULP setsockopt cannot be used for mptcp because its already used internally to plumb subflow (tcp) sockets to the mptcp layer.
syzbot managed to trigger a crash for mptcp connections that are in fallback mode:
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 1083 Comm: syz-executor.3 Not tainted 5.16.0-rc2-syzkaller #0 RIP: 0010:tlsbuildproto net/tls/tls_main.c:776 [inline] [..] _tcpsetulp net/ipv4/tcpulp.c:139 [inline] tcpsetulp+0x428/0x4c0 net/ipv4/tcpulp.c:160 dotcpsetsockopt+0x455/0x37c0 net/ipv4/tcp.c:3391 mptcpsetsockopt+0x1b47/0x2400 net/mptcp/sockopt.c:638
Remove support for TCP_ULP setsockopt.
- References
Affected packages
Git /
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "5.13"
},
{
"fixed": "5.15.11"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc5"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47591.json"