{"id":"CVE-2026-97617","summary":"ring-buffer: Check resize_disabled before publishing the new subbuf order","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Check resize_disabled before publishing the new subbuf order\n\nring_buffer_subbuf_order_set() stores the new order and only then walks\nthe CPUs, returning -EBUSY if any of them has resizing disabled. A user\nmapped buffer has resizing disabled, and __rb_map_vma() reads\nbuffer-\u003esubbuf_order without buffer-\u003emutex, so an mmap of an already\nmapped CPU racing the failing order change sizes the mapping with the\nnew order and inserts pages past the sub-buffer into the VMA.\n\nCheck the CPUs before storing the new order.","modified":"2026-09-26T03:48:27.824975086Z","published":"2026-09-25T10:22:24.436Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97617.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/32bf47db9237c5b8b6f6aaa5356bb4c79d241f76"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d860c67c051685abb0460b593b193f0f45f4fa92"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2099644e1b2a2c0805c5240d63ab0522d9d0174"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97617.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97617"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"117c39200d9d760cbd5944bb89efb7b9c51965aa"},{"fixed":"f2099644e1b2a2c0805c5240d63ab0522d9d0174"},{"fixed":"9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06"},{"fixed":"32bf47db9237c5b8b6f6aaa5356bb4c79d241f76"},{"fixed":"d860c67c051685abb0460b593b193f0f45f4fa92"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97617.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97617.json"}}],"schema_version":"1.9.0"}