fbdev: modedb: fix a possible UAF in fb_find_mode() (CVE-2026-64245) | HOL Guard CVE

High · CVSS 7.8CVE-2026-64245

fbdev: modedb: fix a possible UAF in fb_find_mode()

Answer in brief

CVE-2026-64245 records a High severity (CVSS 7.8) vulnerability in fbdev: modedb: fix a possible UAF in fb_find_mode(). 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 Jul 24, 2026Updated Aug 17, 2026Source checked Oct 1, 2026First seen by HOL Aug 17, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. 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.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=089d924d03d5c17b05d02992f57671ccfba1c4f0 <c7dc382439f7b019e207055b52e9cec051d42fa9 \|\| >=089d924d03d5c17b05d02992f57671ccfba1c4f0 <f906347d75c7fc377041c6d3c535d0f08846aada \|\| >=089d924d03d5c17b05d02992f57671ccfba1c4f0 <4d418cf8daf57e454b4d855bf9b2419fd8e6a540 \|\| >=089d924d03d5c17b05d02992f57671ccfba1c4f0 <13b6f0cdd5cd5e60f682ec43134ab0e2024bd356 \|\| >=089d924d03d5c17b05d02992f57671ccfba1c4f0 <85b6256469cebdac395e7447147e06b2e151014f	c7dc382439f7b019e207055b52e9cec051d42fa9, f906347d75c7fc377041c6d3c535d0f08846aada, 4d418cf8daf57e454b4d855bf9b2419fd8e6a540, 13b6f0cdd5cd5e60f682ec43134ab0e2024bd356, 85b6256469cebdac395e7447147e06b2e151014f
Linux/Linuxgeneric	6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to c7dc382439f7b019e207055b52e9cec051d42fa9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: fbdev: modedb: fix a possible UAF in fb_find_mode() If mode_option is NULL, it is assigned from mode_option_buf: if (!mode_option) { fb_get_options(NULL, &mode_option_buf); mode_option = mode_option_buf; } Later, name is assigned from mode_option: const char *name = mode_option; However, mode_option_buf is freed before name is no longer used: kfree(mode_option_buf); while name is still accessed by: if ((name_matches(db[i], name, namelen) || Since name aliases mode_option_buf, this may result in a use-after-free. Fix this by extending the lifetime of mode_option_buf until the end of the function by using scope-based resource management for cleanup.

Quoted source text, attributed separately from HOL analysis.