Answer in brief
CVE-2026-89806 records a High severity (CVSS 8.4) vulnerability in drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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 8.4. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <711fe7949d37656a5586244afee9523b9e5e37e9 || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <ded6ad826fe0fd059333d3a3b3e1742c8e45ff41 || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <d9daf9a6e7a6f82ef338a09386eefc6807100d3f || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <c6f48e59ece0123f6a11527ad4d89b21c2d65b87 | 711fe7949d37656a5586244afee9523b9e5e37e9, ded6ad826fe0fd059333d3a3b3e1742c8e45ff41, d9daf9a6e7a6f82ef338a09386eefc6807100d3f, c6f48e59ece0123f6a11527ad4d89b21c2d65b87 |
| Linux/Linuxgeneric | 6.2 | Not reported |
| Linux/Linuxgeneric | >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <ded6ad826fe0fd059333d3a3b3e1742c8e45ff41 || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <d9daf9a6e7a6f82ef338a09386eefc6807100d3f || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <c6f48e59ece0123f6a11527ad4d89b21c2d65b87 | ded6ad826fe0fd059333d3a3b3e1742c8e45ff41, d9daf9a6e7a6f82ef338a09386eefc6807100d3f, c6f48e59ece0123f6a11527ad4d89b21c2d65b87 |
| Linux/Linuxgeneric | >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <0cec951667a624fafaca2695c46042f45851caec || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <711fe7949d37656a5586244afee9523b9e5e37e9 || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <ded6ad826fe0fd059333d3a3b3e1742c8e45ff41 || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <d9daf9a6e7a6f82ef338a09386eefc6807100d3f || >=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <c6f48e59ece0123f6a11527ad4d89b21c2d65b87 | 0cec951667a624fafaca2695c46042f45851caec, 711fe7949d37656a5586244afee9523b9e5e37e9, ded6ad826fe0fd059333d3a3b3e1742c8e45ff41, d9daf9a6e7a6f82ef338a09386eefc6807100d3f, c6f48e59ece0123f6a11527ad4d89b21c2d65b87 |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation The framebuffer size calculation `fb_size = linebytes * height` can overflow when both values are large (e.g., 46341 * 46341 > INT_MAX). Since linebytes and height are both int types, the multiplication is performed as int * int, which results in undefined behavior on overflow. Use check_mul_overflow() to detect and prevent this overflow, consistent with the approach used in simpledrm.c and corebootdrm.c.
Quoted source text, attributed separately from HOL analysis.