dm raid1: reserve space for NUL-terminator in build_constructor_string() (CVE-2026-89575) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89575

dm raid1: reserve space for NUL-terminator in build_constructor_string()

Answer in brief

CVE-2026-89575 records a Unknown severity vulnerability in dm raid1: reserve space for NUL-terminator in build_constructor_string(). 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	>=f5db4af466e2dca0fe822019812d586ca910b00c <0a3657ebd6b517b60cdc5123894047616974e25b \|\| >=f5db4af466e2dca0fe822019812d586ca910b00c <644140527ae494cedf3b5c0ecd16287deaea7a66 \|\| >=f5db4af466e2dca0fe822019812d586ca910b00c <f79b53ca3a68a46c6fc3b30b148d1dfb1b33ea8b \|\| >=f5db4af466e2dca0fe822019812d586ca910b00c <73c37fe54cd056d07461b142ab0b8b81e1ef6ad8	0a3657ebd6b517b60cdc5123894047616974e25b, 644140527ae494cedf3b5c0ecd16287deaea7a66, f79b53ca3a68a46c6fc3b30b148d1dfb1b33ea8b, 73c37fe54cd056d07461b142ab0b8b81e1ef6ad8
Linux/Linuxgeneric	2.6.31	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0a3657ebd6b517b60cdc5123894047616974e25b 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: dm raid1: reserve space for NUL-terminator in build_constructor_string() Reserve space for the termination NUL after the maximum 20 decimal digits of a long long value to avoid buffer overflow in sprintf().

Quoted source text, attributed separately from HOL analysis.