{"id":"CVE-2026-98846","published":"2026-10-18T16:17:38.947","lastModified":"2026-10-19T10:19:48.700","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: check RCV_SHUTDOWN after the sendmsg connect wait\n\nsctp_wait_for_connect() drops the socket lock while it sleeps. An\nout-of-the-blue ABORT can then be processed from the socket backlog and\nunlink the association. If a concurrent shutdown(fd, SHUT_RD) sets\nRCV_SHUTDOWN, the waiter breaks with err == 0 before checking\nasoc->base.dead. Its final sctp_association_put() can then free the\nassociation, leaving sctp_sendmsg_to_asoc() to continue with a dangling\npointer.\n\nCheck RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc()\nbefore using the association again. The check only accesses the socket,\nso it needs no additional association reference. Return the existing\n-ESRCH so that sctp_sendmsg() skips freeing a new association that may\nalready have been destroyed.\n\nKeep sctp_wait_for_connect() unchanged to preserve its behavior for the\nconnect() caller.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669","tags":[]},{"url":"https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c","tags":[]},{"url":"https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938","tags":[]},{"url":"https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}