erofs: skip sufficiently large global buffers when resizing (CVE-2026-89602) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89602

erofs: skip sufficiently large global buffers when resizing

Answer in brief

CVE-2026-89602 records a Unknown severity vulnerability in erofs: skip sufficiently large global buffers when resizing. 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 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	>=d6db47e571dcaecaeaafa8840d00ae849ae3907b <7267557ce98ccd07faaf3bc86382448950cc4ff6 \|\| >=d6db47e571dcaecaeaafa8840d00ae849ae3907b <7f4a89d4f0d6acaf4b756c31de48f2109a257b70 \|\| >=d6db47e571dcaecaeaafa8840d00ae849ae3907b <a7d097cf01301c5da37927c8f26123d006f0fd8a	7267557ce98ccd07faaf3bc86382448950cc4ff6, 7f4a89d4f0d6acaf4b756c31de48f2109a257b70, a7d097cf01301c5da37927c8f26123d006f0fd8a
Linux/Linuxgeneric	6.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7267557ce98ccd07faaf3bc86382448950cc4ff6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: erofs: skip sufficiently large global buffers when resizing z_erofs_gbuf_nrpages is advanced only after every global buffer has been grown. If a resize fails after some buffers were enlarged, a retry revisits those enlarged buffers. Retrying the same size then returns -ENOMEM because alloc_pages_bulk() has no pages to add and the unchanged return value is treated as a failure. Retrying an intermediate size allocates a temporary pointer array smaller than gbuf->nrpages and copies more existing pointers than the array can hold. Skip buffers that already satisfy the request. Once all remaining buffers have caught up, advancing z_erofs_gbuf_nrpages again describes the guaranteed minimum size across the pool.

Quoted source text, attributed separately from HOL analysis.