CVE-2026-97548 Linux kernel xfs - Out of Bounds Read

Linux kernel xfs contains a buffer over-read caused by incorrect maxlevels_ondisk calculations in rtrmap and rtrefcount btree cursor functions, letting attackers cause out-of-bounds memory access, exploit requires large btree structure.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix.

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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