cxl/features: Clamp Get Feature output size to the remaining buffer (CVE-2026-93077) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93077

cxl/features: Clamp Get Feature output size to the remaining buffer

Answer in brief

CVE-2026-93077 records a Unknown severity vulnerability in cxl/features: Clamp Get Feature output size to the remaining buffer. 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 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 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	>=5e5ac21f629de796ab5d598b59c5e468c6fe4f95 <b8abbd5c2928fd839dab702244cc57b228ab43aa \|\| >=5e5ac21f629de796ab5d598b59c5e468c6fe4f95 <ca95b15a0760e7724e61addbdd61050be13b6406 \|\| >=5e5ac21f629de796ab5d598b59c5e468c6fe4f95 <2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83	b8abbd5c2928fd839dab702244cc57b228ab43aa, ca95b15a0760e7724e61addbdd61050be13b6406, 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b8abbd5c2928fd839dab702244cc57b228ab43aa if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.

Quoted source text, attributed separately from HOL analysis.