cdx: Fix double free when sysfs file creation fails (CVE-2026-93215) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93215

cdx: Fix double free when sysfs file creation fails

Answer in brief

CVE-2026-93215 records a Unknown severity vulnerability in cdx: Fix double free when sysfs file creation fails. 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 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 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	>=aeda33ab8160c7a2e24ba4f44492ad1e974ddc7d <88f4cd42a04bdadd189d7f667a4c279f4e962ca6 \|\| >=aeda33ab8160c7a2e24ba4f44492ad1e974ddc7d <4cd24873ab9fdbd730604881a6e8087bc7b99336 \|\| >=aeda33ab8160c7a2e24ba4f44492ad1e974ddc7d <7e9451bf0bdba6daee1eaf4e7566612af6ca1c32 \|\| >=aeda33ab8160c7a2e24ba4f44492ad1e974ddc7d <6f4acc3a3c300e174e3f586b97b04ed8f5948c36	88f4cd42a04bdadd189d7f667a4c279f4e962ca6, 4cd24873ab9fdbd730604881a6e8087bc7b99336, 7e9451bf0bdba6daee1eaf4e7566612af6ca1c32, 6f4acc3a3c300e174e3f586b97b04ed8f5948c36
Linux/Linuxgeneric	6.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 88f4cd42a04bdadd189d7f667a4c279f4e962ca6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: cdx: Fix double free when sysfs file creation fails In cdx_create_res_attr(), if sysfs_create_bin_file() fails, the code frees res_attr but doesn't set cdx_dev->res_attr[num] to NULL. This leaves a dangling pointer in the array. Then cdx_destroy_res_attr() frees the already-freed memory. Fix the double free by initializing cdx_dev->res_attr[num] after sysfs_create_bin_file() completes.

Quoted source text, attributed separately from HOL analysis.