{"id":"CVE-2026-89601","title":"In the Linux kernel, the following vulnerability has been resolved:\n\next2: Fix lost inode updates for IS_SYNC inodes\n\next2_setsize() and ext2_xattr_set2() had a construct like:\n\n\tif (IS_SYNC(inode)) {\n\t\tsync_inode_metadata(inode, 1);\n\t} …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\next2: Fix lost inode updates for IS_SYNC inodes\n\next2_setsize() and ext2_xattr_set2() had a construct like:\n\n\tif (IS_SYNC(inode)) {\n\t\tsync_inode_metadata(inode, 1);\n\t} …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-821"],"vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5481766125041e71662f2e32ee0e91ad5f4d07f4","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5efb3350230fef831167740e69e6db2861101186","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 356984d1a5c32e94810cbb6c8dc7d8ff2d4d919a","Linux 2.6.12"],"published":"2026-09-11","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:54.330","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89601","references":[{"url":"https://git.kernel.org/stable/c/356984d1a5c32e94810cbb6c8dc7d8ff2d4d919a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5481766125041e71662f2e32ee0e91ad5f4d07f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5efb3350230fef831167740e69e6db2861101186","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89601.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89601"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532345"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89601"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89601"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89601.mbox"},{"url":"https://git.kernel.org/stable/c/b879565effd88fc119c2efea3f3868a9997ed9ba"},{"url":"https://git.kernel.org/stable/c/e54de654423bee98d1ba50379b09daf97c7854a6"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00601,"epssPercentile":0.48541,"scores":{"nvd":8.8,"cna":8.8,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.474Z","slug":"CVE-2026-89601","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\next2: Fix lost inode updates for IS_SYNC inodes\n\next2_setsize() and ext2_xattr_set2() had a construct like:\n\n\tif (IS_SYNC(inode)) {\n\t\tsync_inode_metadata(inode, 1);\n\t} else {\n\t\tmark_inode_dirty(inode);\n\t}\n\nwhich leads to lost inode updates for IS_SYNC inodes because\nsync_inode_metadata() does anything only if the inode is already dirty\nand hence inode updates may be simply lost. Fix the problem by\nunconditionally marking the inode dirty and *then* call\nsync_inode_metadata().\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 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89601.json)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":222164,"id":"CVE-2026-89601","ts":1792062151133,"field":"cvss","old":"5.5","new":"8.8"},{"seq":222163,"id":"CVE-2026-89601","ts":1792062151133,"field":"severity","old":"medium","new":"high"},{"seq":205492,"id":"CVE-2026-89601","ts":1789576721957,"field":"cvss","old":"6.1","new":"5.5"},{"seq":202861,"id":"CVE-2026-89601","ts":1789403732707,"field":"cvss","old":"8.8","new":"6.1"},{"seq":202860,"id":"CVE-2026-89601","ts":1789403732707,"field":"severity","old":"high","new":"medium"},{"seq":197872,"id":"CVE-2026-89601","ts":1789384320758,"field":"cvss","old":"6.1","new":"8.8"},{"seq":197871,"id":"CVE-2026-89601","ts":1789384320758,"field":"severity","old":"medium","new":"high"},{"seq":183431,"id":"CVE-2026-89601","ts":1789356675341,"field":"cvss","old":"8.8","new":"6.1"},{"seq":183430,"id":"CVE-2026-89601","ts":1789356675341,"field":"severity","old":"high","new":"medium"},{"seq":153422,"id":"CVE-2026-89601","ts":1789285350448,"field":"cvss","old":null,"new":"8.8"},{"seq":153421,"id":"CVE-2026-89601","ts":1789285350448,"field":"severity","old":"none","new":"high"},{"seq":147351,"id":"CVE-2026-89601","ts":1789270210566,"field":"cvss","old":null,"new":"6.1"},{"seq":147350,"id":"CVE-2026-89601","ts":1789270210566,"field":"severity","old":"none","new":"medium"},{"seq":109104,"id":"CVE-2026-89601","ts":1789183730319,"field":"cvss","old":null,"new":"6.1"},{"seq":109103,"id":"CVE-2026-89601","ts":1789183730319,"field":"severity","old":"none","new":"medium"}]}