CVE-2026-89492 Linux Kernel ocfs2 - Out-of-Bounds Read

Linux kernel ocfs2 filesystem contains an out-of-bounds read vulnerability caused by missing bounds checks on directory-index entry counts in metadata blocks, letting attackers with crafted on-disk images cause slab out-of-bounds reads during directory operations, exploit requires mounting a crafted filesystem image.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.64% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Information Disclosure, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for commit 775c17386a6f or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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