{"id":"CVE-2026-93269","summary":"ext4: fix circular lock dependency in ext4_ext_migrate","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix circular lock dependency in ext4_ext_migrate\n\nMove iput(tmp_inode) after ext4_writepages_up_write() to avoid a\ncircular lock dependency between s_writepages_rwsem and sb_internal\n(freeze protection).\n\nThe deadlock scenario:\n\n  CPU0 (EXT4_IOC_MIGRATE)        CPU1 (orphan cleanup during mount)\n  ----                           ----\n  ext4_ext_migrate()\n    ext4_writepages_down_write()\n      s_writepages_rwsem (write)\n                                 ext4_evict_inode()\n                                   sb_start_intwrite()   [sb_internal]\n                                   ...\n                                     ext4_writepages()\n                                       s_writepages_rwsem (read) [BLOCKED]\n    iput(tmp_inode)\n      ext4_evict_inode()\n        sb_start_intwrite()         [BLOCKED]\n\nThe tmp_inode is a temporary inode with nlink=0 created solely for\nbuilding the extent tree.  Its eviction does not require\ns_writepages_rwsem protection, so deferring iput() until after\nreleasing the rwsem is safe.","modified":"2026-11-13T04:07:17.698266104Z","published":"2026-09-24T15:52:09.047Z","related":["SUSE-SU-2026:24181-1","SUSE-SU-2026:24182-1","SUSE-SU-2026:24315-1","SUSE-SU-2026:24316-1","SUSE-SU-2026:24643-1","SUSE-SU-2026:24648-1","SUSE-SU-2026:24651-1","SUSE-SU-2026:24662-1","SUSE-SU-2026:4640-1","SUSE-SU-2026:4706-1","SUSE-SU-2026:5121-1","openSUSE-SU-2026:11893-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93269.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/32f7ab52875ec7f800ca67e7176e5743a84baddf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/452950461241dfed8b1d32e94b227db38c99c5af"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a897682793eba5de51ee6f3152760374afa629cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ada23457d4748d6e9c36c6f871fc29a6f558c48c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4223231b6860141813637a6413c2371ae4d6fa8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f204882d5eaca09f7848f081c9c9b5bbf2234895"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93269.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93269"},{"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":"cb85f4d23f794e24127f3e562cb3b54b0803f456"},{"fixed":"f204882d5eaca09f7848f081c9c9b5bbf2234895"},{"fixed":"452950461241dfed8b1d32e94b227db38c99c5af"},{"fixed":"ada23457d4748d6e9c36c6f871fc29a6f558c48c"},{"fixed":"e4223231b6860141813637a6413c2371ae4d6fa8"},{"fixed":"32f7ab52875ec7f800ca67e7176e5743a84baddf"},{"fixed":"a897682793eba5de51ee6f3152760374afa629cf"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"eb799e163dc2bc1ea0a4820b66f79d32a5e907df"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bcc1eab71a67c46b9e24544ac7923f44444174ce"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8cf20fb73e73a4c4df0328b5297842c5ef34fdd9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e5d25003d059649e18a249635ed5ca7a7b1de5ad"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"69f8a7991fd93c49096ddd11574db3e7df238b7b"}]}],"versions":["v4.9.337","v4.9.336","v4.9.335","v4.9.334","v4.9.333","v4.9.332","v4.9.331","v4.9.330","v4.9.329","v4.9.328","v4.9.327","v4.9.326","v4.9.325","v4.9.324","v4.9.323","v4.9.322","v4.9.321","v4.9.320","v4.9.319","v4.9.318","v4.9.317","v4.9.316","v4.9.315","v4.9.314","v4.9.313","v4.9.312","v4.9.311","v4.9.310","v4.9.309","v4.9.308","v4.9.307","v4.9.306","v4.9.305","v4.9.304","v4.9.303","v4.9.302","v4.9.301","v4.9.300","v4.9.299","v4.9.298","v4.9.297","v4.9.296","v4.9.295","v4.9.294","v4.9.293","v4.9.292","v4.9.291","v4.9.290","v4.9.289","v4.9.288","v4.9.287","v4.9.286","v4.9.285","v4.9.284","v4.9.283","v4.9.282","v4.9.281","v4.9.280","v4.9.279","v4.9.278","v4.9.277","v4.9.276","v4.9.275","v4.9.274","v4.9.273","v4.9.272","v4.9.271","v4.9.270","v4.9.269","v4.9.268","v4.9.267","v4.9.266","v4.9.265","v4.9.264","v4.9.263","v4.9.262","v4.9.261","v4.9.260","v4.9.259","v4.9.258","v4.9.257","v4.9.256","v4.9.255","v4.9.254","v4.9.253","v4.9.252","v4.9.251","v4.9.250","v4.9.249","v4.9.248","v4.9.247","v4.9.246","v4.9.245","v4.9.244","v4.9.243","v4.9.242","v4.9.241","v4.9.240","v4.9.239","v4.9.238","v4.9.237","v4.9.236","v4.9.235","v4.9.234","v4.9.233","v4.9.232","v4.9.231","v4.9.230","v4.9.229","v4.9.228","v4.9.227","v4.9.226","v4.9.225","v4.9.224","v4.9.223","v4.9.222","v4.9.221","v4.9.220","v4.9.219","v4.9.218","v4.9.217","v4.9.216","v4.9.215","v4.14.336","v4.14.335","v4.14.334","v4.14.333","v4.14.332","v4.14.331","v4.14.330","v4.14.329","v4.14.328","v4.14.327","v4.14.326","v4.14.325","v4.14.324","v4.14.323","v4.14.322","v4.14.321","v4.14.320","v4.14.319","v4.14.318","v4.14.317","v4.14.316","v4.14.315","v4.14.314","v4.14.313","v4.14.312","v4.14.311","v4.14.310","v4.14.309","v4.14.308","v4.14.307","v4.14.306","v4.14.305","v4.14.304","v4.14.303","v4.14.302","v4.14.301","v4.14.300","v4.14.299","v4.14.298","v4.14.297","v4.14.296","v4.14.295","v4.14.294","v4.14.293","v4.14.292","v4.14.291","v4.14.290","v4.14.289","v4.14.288","v4.14.287","v4.14.286","v4.14.285","v4.14.284","v4.14.283","v4.14.282","v4.14.281","v4.14.280","v4.14.279","v4.14.278","v4.14.277","v4.14.276","v4.14.275","v4.14.274","v4.14.273","v4.14.272","v4.14.271","v4.14.270","v4.14.269","v4.14.268","v4.14.267","v4.14.266","v4.14.265","v4.14.264","v4.14.263","v4.14.262","v4.14.261","v4.14.260","v4.14.259","v4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