{"id":"CVE-2026-93269","title":"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_r…","summary":"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_r…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= cb85f4d23f794e24127f3e562cb3b54b0803f456 < 452950461241dfed8b1d32e94b227db38c99c5af","Linux >= cb85f4d23f794e24127f3e562cb3b54b0803f456 < ada23457d4748d6e9c36c6f871fc29a6f558c48c","Linux >= cb85f4d23f794e24127f3e562cb3b54b0803f456 < e4223231b6860141813637a6413c2371ae4d6fa8","Linux >= cb85f4d23f794e24127f3e562cb3b54b0803f456 < 32f7ab52875ec7f800ca67e7176e5743a84baddf","Linux >= cb85f4d23f794e24127f3e562cb3b54b0803f456 < a897682793eba5de51ee6f3152760374afa629cf","Linux eb799e163dc2bc1ea0a4820b66f79d32a5e907df","Linux bcc1eab71a67c46b9e24544ac7923f44444174ce","Linux 8cf20fb73e73a4c4df0328b5297842c5ef34fdd9","Linux e5d25003d059649e18a249635ed5ca7a7b1de5ad","Linux 69f8a7991fd93c49096ddd11574db3e7df238b7b","Linux >= 4.9.215 < 4.10","Linux >= 4.14.172 < 4.15","Linux >= 4.19.107 < 4.20","Linux >= 5.4.23 < 5.5","Linux >= 5.5.7 < 5.6","Linux 5.6"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T16:17:23.873","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93269","references":[{"url":"https://git.kernel.org/stable/c/32f7ab52875ec7f800ca67e7176e5743a84baddf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/452950461241dfed8b1d32e94b227db38c99c5af","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a897682793eba5de51ee6f3152760374afa629cf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ada23457d4748d6e9c36c6f871fc29a6f558c48c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e4223231b6860141813637a6413c2371ae4d6fa8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93269.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93269"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540362"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93269"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93269"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93269.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-24T16:47:15.838Z","epss":0.00191,"epssPercentile":0.0873,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-833"],"slug":"CVE-2026-93269","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93269.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224227,"id":"CVE-2026-93269","ts":1792325024242,"field":"cvss","old":null,"new":"5.5"},{"seq":224226,"id":"CVE-2026-93269","ts":1792325024242,"field":"severity","old":"none","new":"medium"}]}