zram: validate deflate params

Answer in brief

CVE-2026-89716 records a Unknown severity vulnerability in zram: validate deflate params. 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 12, 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	>=dc75a0d93bd5a1c64104efb4ec680463afbdd755 <923578d0f0d0703c3db61ab35dc37075ae53b0bd \|\| >=dc75a0d93bd5a1c64104efb4ec680463afbdd755 <e23fac4ab2a5728386477b98a402a1042b21bffb \|\| >=dc75a0d93bd5a1c64104efb4ec680463afbdd755 <ec7607ac4717ff521c9c1e9d8271c26293345513	923578d0f0d0703c3db61ab35dc37075ae53b0bd, e23fac4ab2a5728386477b98a402a1042b21bffb, ec7607ac4717ff521c9c1e9d8271c26293345513
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 923578d0f0d0703c3db61ab35dc37075ae53b0bd 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: zram: validate deflate params We must validate user-supplied deflate winbits before we pass it to zlib_deflate_workspacesize(), which triggers BUG_ON() if winbits value is outside of valid ranges.

Quoted source text, attributed separately from HOL analysis.