f2fs: validate inline dentry name lengths before conversion (CVE-2026-93816) | HOL Guard CVE

High · CVSS 7.1CVE-2026-93816

f2fs: validate inline dentry name lengths before conversion

Answer in brief

CVE-2026-93816 records a High severity (CVSS 7.1) vulnerability in f2fs: validate inline dentry name lengths before conversion. The current sources do not mark it as known exploited. The current feed maps 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 24, 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 7.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.1. 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). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2ce0bc5853bec7cdc724477a87ea579fde664243 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7caa8a0ae94b132576c2e46e9b4fd4e0f356f373 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cfcd0e49a178b3dac2c0ece656079081dbf5da74 \|\| >=0 <6.12.111 \|\| >=0 <6.18.53	2ce0bc5853bec7cdc724477a87ea579fde664243, 7caa8a0ae94b132576c2e46e9b4fd4e0f356f373, cfcd0e49a178b3dac2c0ece656079081dbf5da74, 6.12.111, 6.18.53

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to 2ce0bc5853bec7cdc724477a87ea579fde664243 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 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: f2fs: validate inline dentry name lengths before conversion Inline dentry conversion copies names out of the inline dentry area before checking that each recorded name length fits in the available filename slots. A corrupted image can therefore make the conversion path read past the inline filename storage while building the regular dentry block. Validate each inline dentry name length against the inline filename area before copying it.

Quoted source text, attributed separately from HOL analysis.