High severity · published Sep 11, 2026
CVE-2026-89601
ext2: Fix lost inode updates for IS_SYNC inodes
8.8
CVSS
0.6%
EPSS
No
On KEV
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().
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b879565effd88fc119c2efea3f3868a9997ed9ba; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e54de654423bee98d1ba50379b09daf97c7854a6; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5481766125041e71662f2e32ee0e91ad5f4d07f4; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5efb3350230fef831167740e69e6db2861101186; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 356984d1a5c32e94810cbb6c8dc7d8ff2d4d919a; 2.6.12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89601
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89601
git.kernel.org
https://git.kernel.org/stable/c/356984d1a5c32e94810cbb6c8dc7d8ff2d4d919a
git.kernel.org
https://git.kernel.org/stable/c/5481766125041e71662f2e32ee0e91ad5f4d07f4
git.kernel.org
https://git.kernel.org/stable/c/5efb3350230fef831167740e69e6db2861101186
git.kernel.org
https://git.kernel.org/stable/c/b879565effd88fc119c2efea3f3868a9997ed9ba
git.kernel.org
https://git.kernel.org/stable/c/e54de654423bee98d1ba50379b09daf97c7854a6
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