{"id":"CVE-2026-43411","summary":"tipc: fix divide-by-zero in tipc_sk_filter_connect()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix divide-by-zero in tipc_sk_filter_connect()\n\nA user can set conn_timeout to any value via\nsetsockopt(TIPC_CONN_TIMEOUT), including values less than 4.  When a\nSYN is rejected with TIPC_ERR_OVERLOAD and the retry path in\ntipc_sk_filter_connect() executes:\n\n    delay %= (tsk-\u003econn_timeout / 4);\n\nIf conn_timeout is in the range [0, 3], the integer division yields 0,\nand the modulo operation triggers a divide-by-zero exception, causing a\nkernel oops/panic.\n\nFix this by clamping conn_timeout to a minimum of 4 at the point of use\nin tipc_sk_filter_connect().\n\nOops: divide error: 0000 [#1] SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 119 Comm: poc-F144 Not tainted 7.0.0-rc2+\nRIP: 0010:tipc_sk_filter_rcv (net/tipc/socket.c:2236 net/tipc/socket.c:2362)\nCall Trace:\n tipc_sk_backlog_rcv (include/linux/instrumented.h:82 include/linux/atomic/atomic-instrumented.h:32 include/net/sock.h:2357 net/tipc/socket.c:2406)\n __release_sock (include/net/sock.h:1185 net/core/sock.c:3213)\n release_sock (net/core/sock.c:3797)\n tipc_connect (net/tipc/socket.c:2570)\n __sys_connect (include/linux/file.h:62 include/linux/file.h:83 net/socket.c:2098)","modified":"2026-07-11T03:54:30.129363508Z","published":"2026-05-08T14:21:49.543Z","related":["SUSE-SU-2026:22099-1","SUSE-SU-2026:22108-1","SUSE-SU-2026:22112-1","SUSE-SU-2026:22117-1","SUSE-SU-2026:22127-1","SUSE-SU-2026:22137-1","SUSE-SU-2026:22433-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:2482-1","SUSE-SU-2026:2591-1","openSUSE-SU-2026:20965-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43411.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2754e7b3d64748643df867d1ea6fec522914b635"},{"type":"WEB","url":"https://git.kernel.org/stable/c/338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3bc9998041076ee05d3f312a22cee6b2ca35527f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/579956f9f297eb1b6a5d24de313f3acccee1f9d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/600feb0a66a98c6b7f6f02b5f3612e75f9b8540f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6c5a9baa15de240e747263aba435a0951da8d8d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a360d3815aae1f00dd71b7714a846482e85cc1f7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c2ebfbe63deb7bfd4dc2532bae62a7ed67713272"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43411.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43411"},{"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":"6787927475e52f6933e3affce365dabb2aa2fadf"},{"fixed":"600feb0a66a98c6b7f6f02b5f3612e75f9b8540f"},{"fixed":"3bc9998041076ee05d3f312a22cee6b2ca35527f"},{"fixed":"579956f9f297eb1b6a5d24de313f3acccee1f9d5"},{"fixed":"a360d3815aae1f00dd71b7714a846482e85cc1f7"},{"fixed":"c2ebfbe63deb7bfd4dc2532bae62a7ed67713272"},{"fixed":"2754e7b3d64748643df867d1ea6fec522914b635"},{"fixed":"338c5edeb6ae3f12a4b84dff9d71f6f7f8c202c3"},{"fixed":"6c5a9baa15de240e747263aba435a0951da8d8d2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43411.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43411.json"}}],"schema_version":"1.7.5"}