High · CVSS 7.8CVE-2026-89829

f2fs: fix to pass folio->index to f2fs_sanity_check_node_footer()CVE-2026-89829

Answer in brief

CVE-2026-89829 records a High severity (CVSS 7.8) vulnerability in f2fs: fix to pass folio->index to f2fs_sanity_check_node_footer(). 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 Oct 19, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Oct 19, 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	>=cd2fec912a0f04390d446ed692f73f2da842855f <a984446aa9d5b787afa3023fc7b44017b80fe3bc \|\| >=0a736109c9d29de0c26567e42cb99b27861aa8ba <0b196c07407f48a41cd9741cf53e10cb1e23d2e5 \|\| >=0a736109c9d29de0c26567e42cb99b27861aa8ba <7e188e9f9437ab47c3237d609f1b26348d6fea1a \|\| 971aa8e2a4043d92bf62061b79f74fd4ac59165a \|\| >=6.18.13 <6.18.51 \|\| >=6.19.3 <6.20	a984446aa9d5b787afa3023fc7b44017b80fe3bc, 0b196c07407f48a41cd9741cf53e10cb1e23d2e5, 7e188e9f9437ab47c3237d609f1b26348d6fea1a, 6.18.51, 6.20
Linux/Linuxgeneric	7.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to a984446aa9d5b787afa3023fc7b44017b80fe3bc 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
Oct 19, 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 to pass folio->index to f2fs_sanity_check_node_footer() Otherwise in f2fs_sanity_check_node_footer(), it will check the same nid incorrectly.

Quoted source text, attributed separately from HOL analysis.