xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions (CVE-2026-97548) | HOL Guard CVE

High · CVSS 7.8CVE-2026-97548

xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions

Answer in brief

CVE-2026-97548 records a High severity (CVSS 7.8) vulnerability in xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 <108114437915e61e8f88d1cbcc442c3f886a347e \|\| >=9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 <84316cb25af95a60e655ccc8fe646bb5ad631b71 \|\| >=9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 <aa301322f72f82f26e4ba0826018d41388ab9896	108114437915e61e8f88d1cbcc442c3f886a347e, 84316cb25af95a60e655ccc8fe646bb5ad631b71, aa301322f72f82f26e4ba0826018d41388ab9896
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 108114437915e61e8f88d1cbcc442c3f886a347e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.