Answer in brief
CVE-2026-80785 records a Unknown severity vulnerability in fbdev: serialize mode sysfs access with lock_fb_info(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26135631ed8e487bc6aef70cc41934e258d09bbe || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <061db6b7a910b8378f3b2df64f8c0a3ddc6e85f2 || >=0 <7.1.11 | 26135631ed8e487bc6aef70cc41934e258d09bbe, 061db6b7a910b8378f3b2df64f8c0a3ddc6e85f2, 7.1.11 |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26135631ed8e487bc6aef70cc41934e258d09bbe || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <061db6b7a910b8378f3b2df64f8c0a3ddc6e85f2 | 26135631ed8e487bc6aef70cc41934e258d09bbe, 061db6b7a910b8378f3b2df64f8c0a3ddc6e85f2 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
In the Linux kernel, the following vulnerability has been resolved: fbdev: serialize mode sysfs access with lock_fb_info() show_mode(), show_modes(), and store_mode() access fb_info->modelist and fb_info->mode without holding lock_fb_info(). store_modes() takes lock_fb_info() while replacing the modelist and freeing the old one. A concurrent reader or writer can load a pointer to an old modelist entry before store_modes() frees it, then dereference freed memory or store a stale freed pointer in fb_info->mode. Take lock_fb_info() in show_mode(), show_modes(), and store_mode() to serialize with store_modes(). In show_mode(), copy the mode to the stack and format after dropping the lock. In store_mode(), split activate() into a _locked variant to avoid double-locking, and hold the locks for the modelist walk, mode conversion, activation, and fb_info->mode assignment together.
Quoted source text, attributed separately from HOL analysis.