Riskcovery

CVE-2026-97548

xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions

State
Published
Severity
7.8 High
Published
Sep 25, 2026
Updated
Oct 19, 2026
Reserved
Sep 24, 2026

Read the record on cve.org

Description

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

xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions

The _maxlevels_ondisk functions are used to compute the size of in-memory btree cursors for each btree type. Unfortunately, LOLLM noticed that the rtrmap and rtrefcount versions of these functions forget to account for the inode root, which means that we could access beyond the end of the cursor given a sufficiently large btree. Fix this.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 to before 108114437915e61e8f88d1cbcc442c3f886a347eAffected
  • 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 to before 84316cb25af95a60e655ccc8fe646bb5ad631b71Affected
  • 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 to before aa301322f72f82f26e4ba0826018d41388ab9896Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.53 through 6.18.*Not affected
  • 7.2.7 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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