Answer in brief
CVE-2026-80580 records a High severity (CVSS 7.8) vulnerability in fbdev: bound mode sysfs output to the sysfs buffer. 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.
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.
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 <873a1aa15c313263f2e18b38cf525623cc4fabf6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d15d51fb26e830af58f3f21964f1c09c239077ea || >=0 <7.1.10 | 873a1aa15c313263f2e18b38cf525623cc4fabf6, d15d51fb26e830af58f3f21964f1c09c239077ea, 7.1.10 |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <873a1aa15c313263f2e18b38cf525623cc4fabf6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d15d51fb26e830af58f3f21964f1c09c239077ea | 873a1aa15c313263f2e18b38cf525623cc4fabf6, d15d51fb26e830af58f3f21964f1c09c239077ea |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
In the Linux kernel, the following vulnerability has been resolved: fbdev: bound mode sysfs output to the sysfs buffer mode_string() uses snprintf() which can return a value larger than the remaining buffer space. show_modes() accumulates the return value into i without checking whether i has reached PAGE_SIZE, causing the offset to advance past the sysfs buffer if the modelist is long enough. Add a size parameter to mode_string() and use scnprintf() to return only the bytes actually written. Add an early return when offset already exceeds the buffer. In show_modes(), stop accumulating once the buffer is full.
Quoted source text, attributed separately from HOL analysis.