{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64524", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:20:48.193Z", "dateUpdated": "2026-07-25T09:20:48.193Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T09:20:48.193Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/hyperv: validate resolution_count and fix WIN8 fallback\n\nA SYNTHVID_RESOLUTION_RESPONSE with resolution_count > 64 walks past\nthe supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT] array in the\nparse loop. Bound resolution_count against the array size, folded\ninto the existing zero-check.\n\nWhen the WIN10 resolution probe fails, the caller in\nhyperv_connect_vsp() left hv->screen_*_max / preferred_* unpopulated,\nwhich sets mode_config.max_width / max_height to 0 and makes\ndrm_internal_framebuffer_create() reject every userspace framebuffer\nwith -EINVAL. The pre-WIN10 branch had the same gap for\npreferred_width / preferred_height. Use a single post-probe fallback\nguarded by screen_width_max == 0 so both paths converge on the WIN8\ndefaults."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/hyperv/hyperv_drm_proto.c"], "versions": [{"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "96f7de3172d4aa878b7f87173b2b3507c350fcd6", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "bc573752f3dac0d1ab8df7078c1851bc76717653", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "1fb565b77b8f44afabb02de6310065f109d89e94", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "a321c908f2eeea01539668eb270d074d9b88e490", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "9c698b2c43c2667c34f5336bf46ad5786216ac2a", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "8a114b25b5521eae451b13bce98ae978624962e5", "status": "affected", "versionType": "git"}, {"version": "76c56a5affeba1e163b66b9d8cc192e6154466f0", "lessThan": "13d33b9ef67066c77c84273fac5a1d3fde3533d1", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/hyperv/hyperv_drm_proto.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/96f7de3172d4aa878b7f87173b2b3507c350fcd6"}, {"url": "https://git.kernel.org/stable/c/bc573752f3dac0d1ab8df7078c1851bc76717653"}, {"url": "https://git.kernel.org/stable/c/1fb565b77b8f44afabb02de6310065f109d89e94"}, {"url": "https://git.kernel.org/stable/c/a321c908f2eeea01539668eb270d074d9b88e490"}, {"url": "https://git.kernel.org/stable/c/9c698b2c43c2667c34f5336bf46ad5786216ac2a"}, {"url": "https://git.kernel.org/stable/c/8a114b25b5521eae451b13bce98ae978624962e5"}, {"url": "https://git.kernel.org/stable/c/13d33b9ef67066c77c84273fac5a1d3fde3533d1"}], "title": "drm/hyperv: validate resolution_count and fix WIN8 fallback", "x_generator": {"engine": "bippy-1.2.0"}}}}

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