{"cve":"CVE-2026-99122","nvd":{"published":"2026-10-28T11:17:31.847","modified":"2026-10-28T11:17:31.847","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/vmci: validate packet source for connected sockets\n\nvmci_transport_recv_stream_cb() looks up sockets first by the full source\nand destination tuple, then by destination only in the bound table. The\nfallback can select a non-listening socket without checking whether the\npacket came from its stored peer.\n\nThis was reproduced with two VMCI contexts. A RST from the context not\nstored in a TCP_SYN_SENT socket reset that socket after it was selected by\nthe destination-only lookup.\n\nVMCI can process notification packets in bottom-half context when the\nsocket is not owned by user context, or defer packets to a workqueue. Use\nvsock_check_source() after taking the socket lock in the bottom-half path,\nand recheck after lock_sock() in the workqueue path. Listening sockets\ncontinue to accept packets from any source.\n\nReply with a RST addressed from the received packet before dropping a\nsource that fails validation. This preserves the existing reset behavior\nfor bound non-listening and concurrently closed sockets without directing\nthe reset to a connected socket's stored peer.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/90c423b62ec9be08177f74b07a47937ca8d2035b","https://git.kernel.org/stable/c/ad9a7da3fa39c2d616ec0dd3cf6e30531d032fe7","https://git.kernel.org/stable/c/c027f8b429dbb2157fc1b503df196e272d947c89"],"products":[],"source":"nvd","synced_at":"2026-10-28T11:37:51.394563875+00:00"},"epss":null,"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}