{"id":"CVE-2026-98846","title":"sctp: check RCV_SHUTDOWN after the sendmsg connect wait","summary":"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 f…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < e8f972b1759d26bbefe4c524caae1ed7c8a593bd","Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < e701345d886e831fb593a0870d69c8c5de6fc938","Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669","Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < 4f1da630d13de0370e2f6361f961f1c8b384af1c","Linux 4.16"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:50:34.714Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98846","references":[{"url":"https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd"},{"url":"https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938"},{"url":"https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669"},{"url":"https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.465Z","slug":"CVE-2026-98846","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < e8f972b1759d26bbefe4c524caae1ed7c8a593bd`\n- `Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < e701345d886e831fb593a0870d69c8c5de6fc938`\n- `Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669`\n- `Linux >= 668c9beb9020d5834ee9e43c208190a07d2b1928 < 4f1da630d13de0370e2f6361f961f1c8b384af1c`\n- `Linux 4.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}