CVE-2026-89601

HighCVSS 8.8/10Last modified Oct 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

ext2: Fix lost inode updates for IS_SYNC inodes

ext2_setsize() and ext2_xattr_set2() had a construct like:

if (IS_SYNC(inode)) { sync_inode_metadata(inode, 1); } else { mark_inode_dirty(inode); }

which leads to lost inode updates for IS_SYNC inodes because sync_inode_metadata() does anything only if the inode is already dirty and hence inode updates may be simply lost. Fix the problem by unconditionally marking the inode dirty and *then* call sync_inode_metadata().

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 55e66d84b5272c425b324a2b247cdacacf1e10b9; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b879565effd88fc119c2efea3f3868a9997ed9ba; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e54de654423bee98d1ba50379b09daf97c7854a6; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5481766125041e71662f2e32ee0e91ad5f4d07f4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5efb3350230fef831167740e69e6db2861101186; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 356984d1a5c32e94810cbb6c8dc7d8ff2d4d919a
LinuxLinux2.6.12

References

Timeline

Published
Sep 11, 2026
Last modified
Oct 30, 2026
NVD status
Received

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CVE-2026-89601: High severity, CVSS 8.8 | Vulnix