Unknown severity · Source severity not reportedCVE-2026-98324

dmaengine: pxa: fix double counting of the hw descriptorsCVE-2026-98324

Answer in brief

CVE-2026-98324 records a Unknown severity vulnerability in dmaengine: pxa: fix double counting of the hw descriptors. 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 Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 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	>=69050f8d6d075dc01af7a5f2f550a8067510366f <1de93785f32b450e9eae1e4fcfb7d03eb49eb27e \|\| >=69050f8d6d075dc01af7a5f2f550a8067510366f <f6504be006aa4bb4bd26285f410a885c17920d65	1de93785f32b450e9eae1e4fcfb7d03eb49eb27e, f6504be006aa4bb4bd26285f410a885c17920d65
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 1de93785f32b450e9eae1e4fcfb7d03eb49eb27e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 6, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: pxa: fix double counting of the hw descriptors pxad_alloc_desc() was converted from kzalloc(struct_size(sw_desc, hw_desc, nb_hw_desc), GFP_NOWAIT) to kzalloc_flex(), which sets the __counted_by() counter sw_desc->nb_desc itself - but only where the compiler has __builtin_counted_by_ref(), so from gcc 15.1 or clang 22.1 on. The loop below it still increments nb_desc, which makes it come out doubled there and correct elsewhere. nb_desc is what pxad_free_desc() iterates over and what set_updater_desc() indexes from, so set it explicitly and drop the increment. The error path has to lower it to the number of descriptors allocated so far, otherwise pxad_free_desc() would free entries that were never allocated.

Quoted source text, attributed separately from HOL analysis.