f2fs: fix dentry folio leak in find_in_level

Answer in brief

CVE-2026-89837 records a Unknown severity vulnerability in f2fs: fix dentry folio leak in find_in_level. 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 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=7ad08a58bf67594057362e45cbddd3e27e53e557 <aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922 \|\| >=7ad08a58bf67594057362e45cbddd3e27e53e557 <93a3e6a4c9e726a13a935963e8dc43d181db1527 \|\| >=7ad08a58bf67594057362e45cbddd3e27e53e557 <cca7d3e30bf30333314e31bc70b9a739f1342167	aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922, 93a3e6a4c9e726a13a935963e8dc43d181db1527, cca7d3e30bf30333314e31bc70b9a739f1342167
Linux/Linuxgeneric	5.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dentry folio leak in find_in_level find_in_level() gets a dentry folio with f2fs_find_data_folio() before calling find_in_block(). If find_in_block() returns an error, the function stores the error in res_folio and breaks out of the loop without dropping the dentry folio. This leaks the folio reference on the find_in_block() error path. Drop the dentry folio before returning the error to the caller.

Quoted source text, attributed separately from HOL analysis.