{"id":"CVE-2026-53126","summary":"blk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix disk reference leak in blkcg_maybe_throttle_current()\n\nAdd the missing put_disk() on the error path in\nblkcg_maybe_throttle_current(). When blkcg lookup, blkg lookup, or\nblkg_tryget() fails, the function jumps to the out label which only\ncalls rcu_read_unlock() but does not release the disk reference acquired\nby blkcg_schedule_throttle() via get_device(). Since current-\u003ethrottle_disk\nis already set to NULL before the lookup, blkcg_exit() cannot release\nthis reference either, causing the disk to never be freed.\n\nRestore the reference release that was present as blk_put_queue() in the\noriginal code but was inadvertently dropped during the conversion from\nrequest_queue to gendisk.","modified":"2026-06-25T04:05:21.128826286Z","published":"2026-06-24T16:30:54.594Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53126.json"},"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/000e8454692cab9d1f1b80130e2870e355301d06"},{"type":"WEB","url":"https://git.kernel.org/stable/c/23308af722fefed00af5f238024c11710938fba3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4048ed98860d3785645ebbd34f69566a6c7320c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/73a5af059905d171b398c8b2381632ee499948b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b3e005f16cd98f815429a87aef4c61e9c140779f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53126.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53126"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f05837ed73d0c73e950b2d9f2612febb0d3d451e"},{"fixed":"4048ed98860d3785645ebbd34f69566a6c7320c3"},{"fixed":"73a5af059905d171b398c8b2381632ee499948b5"},{"fixed":"b3e005f16cd98f815429a87aef4c61e9c140779f"},{"fixed":"000e8454692cab9d1f1b80130e2870e355301d06"},{"fixed":"23308af722fefed00af5f238024c11710938fba3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53126.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.6.141"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.91"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.33"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53126.json"}}],"schema_version":"1.7.5"}