CVE-2026-64524

CVE CVE-2026-64524EUVD EUVD-2026-49036Published 2026-07-25T09:20:48.000ZLast changed 2026-08-05T12:42:37.000ZCVSS 7.7

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 5.14; patch: 6.18.35; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <bc573752f3dac0d1ab8df7078c1851bc76717653; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <9c698b2c43c2667c34f5336bf46ad5786216ac2a; patch: 6.12.93; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <8a114b25b5521eae451b13bce98ae978624962e5; patch: 0; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <1fb565b77b8f44afabb02de6310065f109d89e94; patch: 6.1.176; patch: 7.1; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <13d33b9ef67066c77c84273fac5a1d3fde3533d1; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <a321c908f2eeea01539668eb270d074d9b88e490; patch: 5.15.210; 76c56a5affeba1e163b66b9d8cc192e6154466f0 <96f7de3172d4aa878b7f87173b2b3507c350fcd6; patch: 7.0.12; patch: 6.6.143

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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