cpuidle: dt_idle_genpd: kfree() the original name allocation (CVE-2026-89992) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89992

cpuidle: dt_idle_genpd: kfree() the original name allocation

Answer in brief

CVE-2026-89992 records a Unknown severity vulnerability in cpuidle: dt_idle_genpd: kfree() the original name allocation. 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 Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 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	>=9d976d6721dfb525b81ce981e1363c70c0975aab <1312ae33b91430ec99e69cd3d47f0e50a4ebf54b \|\| >=9d976d6721dfb525b81ce981e1363c70c0975aab <a38caa9ed0d5c61c17d88393b14b292199289c1f \|\| >=9d976d6721dfb525b81ce981e1363c70c0975aab <09d002c8fb0261d35ce9d8a705de5db034ee90b8 \|\| >=9d976d6721dfb525b81ce981e1363c70c0975aab <b519dfce1998c323e54a56f911cf708d9ba0e076 \|\| >=9d976d6721dfb525b81ce981e1363c70c0975aab <3394c7ba23336bdb7ece29127130fd01731d42d8 \|\| >=9d976d6721dfb525b81ce981e1363c70c0975aab <2b0ac85512b7f67479127b2713254490662eb13d	1312ae33b91430ec99e69cd3d47f0e50a4ebf54b, a38caa9ed0d5c61c17d88393b14b292199289c1f, 09d002c8fb0261d35ce9d8a705de5db034ee90b8, b519dfce1998c323e54a56f911cf708d9ba0e076, 3394c7ba23336bdb7ece29127130fd01731d42d8, 2b0ac85512b7f67479127b2713254490662eb13d
Linux/Linuxgeneric	5.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1312ae33b91430ec99e69cd3d47f0e50a4ebf54b 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
Sep 16, 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: cpuidle: dt_idle_genpd: kfree() the original name allocation dt_idle_pd_alloc() kasprintf()s the full node path, then points pd->name at kbasename() of that string. dt_idle_pd_free() kfree()s pd->name, which is no longer the start of the allocation. Copy the basename instead.

Quoted source text, attributed separately from HOL analysis.