{"id":"CVE-2026-53292","summary":"net: phonet: do not BUG_ON() in pn_socket_autobind() on failed bind","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phonet: do not BUG_ON() in pn_socket_autobind() on failed bind\n\nsyzbot reported a kernel BUG triggered from pn_socket_sendmsg() via\npn_socket_autobind():\n\n  kernel BUG at net/phonet/socket.c:213!\n  RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline]\n  RIP: 0010:pn_socket_sendmsg+0x240/0x250 net/phonet/socket.c:421\n  Call Trace:\n   sock_sendmsg_nosec+0x112/0x150 net/socket.c:797\n   __sock_sendmsg net/socket.c:812 [inline]\n   __sys_sendto+0x402/0x590 net/socket.c:2280\n   ...\n\npn_socket_autobind() calls pn_socket_bind() with port 0 and, on\n-EINVAL, assumes the socket was already bound and asserts that the\nport is non-zero:\n\n  err = pn_socket_bind(sock, ..., sizeof(struct sockaddr_pn));\n  if (err != -EINVAL)\n          return err;\n  BUG_ON(!pn_port(pn_sk(sock-\u003esk)-\u003esobject));\n  return 0; /* socket was already bound */\n\nHowever pn_socket_bind() also returns -EINVAL when sk-\u003esk_state is not\nTCP_CLOSE, even when the socket has never been bound and pn_port() is\nstill 0.  In that case the BUG_ON() fires and panics the kernel from a\nuser-triggerable path.\n\nTreat the \"bind returned -EINVAL but pn_port() is still 0\" case as a\nregular error and propagate -EINVAL to the caller instead of crashing.\nExisting callers already translate a non-zero return from\npn_socket_autobind() into -ENOBUFS/-EAGAIN, so returning -EINVAL here\nonly changes behaviour from panic to a normal errno.","modified":"2026-07-09T03:51:23.599543803Z","published":"2026-06-26T19:40:51.470Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53292.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5b0c911bcdbd982f7748d11c0b39ec5808eae2de"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6db58ee730bf434d1afca91b91826e26688856ed"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53292.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53292"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ba113a94b7503ee23ffe819e7045134b0c1d31de"},{"fixed":"6db58ee730bf434d1afca91b91826e26688856ed"},{"fixed":"5b0c911bcdbd982f7748d11c0b39ec5808eae2de"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53292.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.28"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53292.json"}}],"schema_version":"1.7.5"}