Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: check RCV_SHUTDOWN after the sendmsg connect wait sctp_wait_for_connect() drops the socket lock while it sleeps. An out-of-the-blue ABORT can then be processed from the socket backlog and unlink the association. If a concurrent shutdown(fd, SHUT_RD) sets RCV_SHUTDOWN, the waiter breaks with err == 0 before checking asoc->base.dead. Its final sctp_association_put() can then free the association, leaving sctp_sendmsg_to_asoc() to continue with a dangling pointer. Check RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc() before using the association again. The check only accesses the socket, so it needs no additional association reference. Return the existing -ESRCH so that sctp_sendmsg() skips freeing a new association that may already have been destroyed. Keep sctp_wait_for_connect() unchanged to preserve its behavior for the connect() caller.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 668c9beb9020d5834ee9e43c208190a07d2b1928 before 1bef1944ef15a40797305bf916827b04df6307ca; affected 668c9beb9020d5834ee9e43c208190a07d2b1928 before e8f972b1759d26bbefe4c524caae1ed7c8a593bd; affected 668c9beb9020d5834ee9e43c208190a07d2b1928 before e701345d886e831fb593a0870d69c8c5de6fc938; affected 668c9beb9020d5834ee9e43c208190a07d2b1928 before 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669; affected 668c9beb9020d5834ee9e43c208190a07d2b1928 before 4f1da630d13de0370e2f6361f961f1c8b384af1c |
| Linux / Linux | affected 4.16; unaffected 0 before 4.16; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/1bef1944ef15a40797305bf916827b04df6307ca
- https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd
- https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938
- https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669
- https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c