Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mptcp: clear 'kern' flag from fallback sockets The mptcp ULP extension relies on sk->sk_sock_kern being set correctly: It prevents setsockopt(fd, IPPROTO_TCP, TCP_ULP, "mptcp", 6); from working for plain tcp sockets (any userspace-exposed socket). But in case of fallback, accept() can return a plain tcp sk. In such case, sk is still tagged as 'kernel' and setsockopt will work. This will crash the kernel, The subflow extension has a NULL ctx->conn mptcp socket: BUG: KASAN: null-ptr-deref in subflow_data_ready+0x181/0x2b0 Call Trace: tcp_data_ready+0xf8/0x370 [..]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be before 451f1eded7f56e93aaf52eb547ba97742d9c0e97; affected cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be before c26ac0ea3a91c210cf90452e625dc441adf3e549; affected cf7da0d66cc1a2a19fc5930bb746ffbb2d4cd1be before d6692b3b97bdc165d150f4c1505751a323a80717 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.88 through 5.10.*; unaffected 5.15.11 through 5.15.*; unaffected 5.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/451f1eded7f56e93aaf52eb547ba97742d9c0e97
- https://git.kernel.org/stable/c/c26ac0ea3a91c210cf90452e625dc441adf3e549
- https://git.kernel.org/stable/c/d6692b3b97bdc165d150f4c1505751a323a80717
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.