Answer in brief
CVE-2026-64524 records a High severity (CVSS 7.7) vulnerability in drm/hyperv: validate resolution_count and fix WIN8 fallback. 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.
CVSS is 7.7. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <96f7de3172d4aa878b7f87173b2b3507c350fcd6 || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <bc573752f3dac0d1ab8df7078c1851bc76717653 || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <1fb565b77b8f44afabb02de6310065f109d89e94 || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <a321c908f2eeea01539668eb270d074d9b88e490 || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <9c698b2c43c2667c34f5336bf46ad5786216ac2a || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <8a114b25b5521eae451b13bce98ae978624962e5 || >=76c56a5affeba1e163b66b9d8cc192e6154466f0 <13d33b9ef67066c77c84273fac5a1d3fde3533d1 | 96f7de3172d4aa878b7f87173b2b3507c350fcd6, bc573752f3dac0d1ab8df7078c1851bc76717653, 1fb565b77b8f44afabb02de6310065f109d89e94, a321c908f2eeea01539668eb270d074d9b88e490, 9c698b2c43c2667c34f5336bf46ad5786216ac2a, 8a114b25b5521eae451b13bce98ae978624962e5, 13d33b9ef67066c77c84273fac5a1d3fde3533d1 |
| Linux/Linuxgeneric | 5.14 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/hyperv: validate resolution_count and fix WIN8 fallback A SYNTHVID_RESOLUTION_RESPONSE with resolution_count > 64 walks past the supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT] array in the parse loop. Bound resolution_count against the array size, folded into the existing zero-check. When the WIN10 resolution probe fails, the caller in hyperv_connect_vsp() left hv->screen_*_max / preferred_* unpopulated, which sets mode_config.max_width / max_height to 0 and makes drm_internal_framebuffer_create() reject every userspace framebuffer with -EINVAL. The pre-WIN10 branch had the same gap for preferred_width / preferred_height. Use a single post-probe fallback guarded by screen_width_max == 0 so both paths converge on the WIN8 defaults.
Quoted source text, attributed separately from HOL analysis.