CVE-2026-64524High· 7.7▾ TwilightIn 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_…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.4 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < 96f7de3172d4aa878b7f87173b2b3507c350fcd6Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < bc573752f3dac0d1ab8df7078c1851bc76717653Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < 1fb565b77b8f44afabb02de6310065f109d89e94Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < a321c908f2eeea01539668eb270d074d9b88e490Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < 9c698b2c43c2667c34f5336bf46ad5786216ac2aLinux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < 8a114b25b5521eae451b13bce98ae978624962e5Linux >= 76c56a5affeba1e163b66b9d8cc192e6154466f0 < 13d33b9ef67066c77c84273fac5a1d3fde3533d1Linux 5.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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