{"id":"CVE-2026-97619","summary":"io_uring/rw: end write accounting from -\u003eki_complete","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rw: end write accounting from -\u003eki_complete\n\nCommit b000145e9907 moved both the fsnotify calls and the write\naccounting out of the kiocb completion handler and into the\nio_req_rw_complete() task_work. However, only the fsnotify part actually\nneeded to move as it may sleep. Ending the write accounting is just a\npercpu_up_read() on the superblock writers sem.\n\nDeferring it is a problem, because it makes dropping SB_FREEZE_WRITE\nprotection depend on the ring owner getting to running task_work. But\nthe task may be blocked in freeze_super(), causing it to never get to\nthat:\n\n  task                             io-wq worker\n  --------------------------------------------------------------\n  io_write()\n    io_kiocb_start_write()         (takes sb_writers, hidden from\n                                    lockdep by __sb_writers_release)\n    write_iter() -\u003e -EIOCBQUEUED\n  ioctl(FS_IOC_SHUTDOWN)\n    bdev_freeze()\n      freeze_super()\n        percpu_down_write()        \u003c- waits for the reader above\n                                   io_write()\n                                     kiocb_start_write()\n                                       percpu_down_read()  \u003c- queued\n                                                              behind the\n                                                              writer\n  \u003cbio completes\u003e\n    io_complete_rw()\n      queues io_req_rw_complete()  \u003c- never runs, task is in D state\n\nEnd the write from io_complete_rw() instead, and leave only the fsnotify\ncalls in task_work.","modified":"2026-09-27T03:47:32.128060509Z","published":"2026-09-25T10:22:25.644Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97619.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/055d43a1233edbd80e558889258105ce63051bcd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/796aa0547557e63338657ed1c487906f9fac4c73"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc580cee4dfa2ec9099c30ecbd4d804cbb996432"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97619.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97619"},{"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":"b000145e9907809406d8164c3b2b8861d95aecd1"},{"fixed":"cc580cee4dfa2ec9099c30ecbd4d804cbb996432"},{"fixed":"055d43a1233edbd80e558889258105ce63051bcd"},{"fixed":"796aa0547557e63338657ed1c487906f9fac4c73"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff"},{"last_affected":"89a410dbd0f159ddd308f19d6eb682fc753e4771"},{"last_affected":"2a853c206e553dd9c0a55c22858fd6a446d93e15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.165"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.90"},{"fixed":"5.16"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.0.3"},{"fixed":"6.1"}]}],"versions":["v5.15.89","v5.10.164","v5.15.88","v5.10.163","v5.15.87","v5.10.162","v5.15.86","v5.10.161","v5.15.85","v5.15.84","v5.10.160","v5.15.83","v5.10.159","v5.15.82","v5.10.158","v5.15.81","v5.10.157","v5.15.80","v5.10.156","v5.15.79","v5.10.155","v5.15.78","v5.10.154","v5.15.77","v5.10.153","v5.15.76","v5.10.152","v5.10.151","v5.15.75","v5.10.150","v6.0-rc1","v5.10.149","v5.15.74","v6.0.2","v5.10.148","v6.0","v6.0.1","v5.15.73","v5.10.147","v5.15.72","v6.0-rc7","v5.15.71","v5.10.146","v6.0-rc3","v6.0-rc2","v5.15.70","v5.10.145","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.10.144","v5.15.69","v5.15.68","v5.10.143","v5.10.142","v5.15.67","v5.15.66","v5.15.65","v5.10.141","v5.15.64","v5.10.140","v5.19","v5.15.63","v5.10.139","v5.10.138","v5.15.62","v5.10.137","v5.15.61","v5.10.136","v5.15.60","v5.19-rc1","v5.15.59","v5.10.135","v5.15.58","v5.10.134","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.15.57","v5.10.133","v5.19-rc3","v5.10.132","v5.15.56","v5.15.55","v5.10.131","v5.19-rc4","v5.10.130","v5.15.54","v5.15.53","v5.10.129","v5.15.52","v5.10.128","v5.15.51","v5.10.127","v5.18-rc1","v5.15.50","v5.10.126","v5.10.125","v5.15.49","v5.10.124","v5.15.48","v5.10.123","v5.15.47","v5.10.122","v5.15.46","v5.10.121","v5.15.45","v5.10.120","v5.15.44","v5.10.119","v5.10.118","v5.15.43","v5.18-rc7","v5.18-rc2","v5.15.42","v5.15.41","v5.10.117","v5.15.40","v5.10.116","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.15.39","v5.10.115","v5.15.38","v5.10.114","v5.15.37","v5.10.113","v5.15.36","v5.15.35","v5.10.112","v5.15.34","v5.10.111","v5.10.110","v5.15.33","v5.10.109","v5.15.32","v5.17-rc6","v5.17-rc4","v5.15.31","v5.10.108","v5.17-rc8","v5.17-rc7","v5.15.30","v5.10.107","v5.17-rc1","v5.15.29","v5.10.106","v5.17-rc3","v5.15.28","v5.10.105","v5.17-rc2","v5.15.27","v5.10.104","v5.15.26","v5.10.103","v5.17-rc5","v5.16","v5.15.25","v5.10.102","v5.15.24","v5.10.101","v5.15.23","v5.10.100","v5.15.22","v5.10.99","v5.15.21","v5.10.98","v5.15.20","v5.10.97","v5.15.19","v5.10.96","v5.15.18","v5.10.95","v5.15.17","v5.10.94","v5.15.16","v5.10.93","v5.10.92","v5.15.15","v5.16-rc1","v5.10.91","v5.15.14","v5.16-rc8","v5.15.13","v5.10.90","v5.16-rc5","v5.16-rc6","v5.15.12","v5.10.89","v5.16-rc7","v5.15.11","v5.10.88","v5.16-rc3","v5.16-rc2","v5.15.10","v5.10.87","v5.15.9","v5.10.86","v5.16-rc4","v5.10.85","v5.15.8","v5.10.84","v5.15.7","v5.15","v5.15.6","v5.10.83","v5.10.82","v5.15.5","v5.10.81","v5.15.4","v5.10.80","v5.15.3","v5.15.2","v5.10.79","v5.15.1","v5.10.78","v5.10.77","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.10.76","v5.15-rc3","v5.15-rc5","v5.10.75","v5.15-rc6","v5.10.74","v5.14","v5.14-rc3","v5.10.73","v5.10.72","v5.10.71","v5.14-rc1","v5.10.70","v5.10.69","v5.10.68","v5.10.67","v5.10.66","v5.10.65","v5.10.64","v5.10.63","v5.10.62","v5.10.61","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.10.60","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.10.59","v5.10.58","v5.10.57","v5.10.56","v5.10.55","v5.13","v5.10.54","v5.10.53","v5.10.52","v5.10.51","v5.10.50","v5.10.49","v5.10.48","v5.13-rc6","v5.10.47","v5.13-rc7","v5.10.46","v5.13-rc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