{"api_version":"1","generated_at":"2026-08-28T19:29:04+00:00","cve":"CVE-2026-80700","urls":{"html":"https://cve.report/CVE-2026-80700","api":"https://cve.report/api/cve/CVE-2026-80700.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80700","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80700"},"summary":{"title":"drm/vmwgfx: validate external BO copy bounds for both stride paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate external BO copy bounds for both stride paths\n\nvmw_external_bo_copy() trusts caller-supplied offsets, strides, and\nheights and operates on imported dma-buf vmaps:\n\n  - The equal-stride memcpy() bound was clamped after subtracting the\n    offsets from dst_size and src_size; an offset larger than the BO\n    size wraps the unsigned subtraction to a huge value and the\n    resulting memcpy() runs off the end of the vmap.  dst_stride *\n    height is also a u32 multiplication that can overflow.\n  - The non-equal-stride row-by-row path had no bound at all.  The\n    loop touches bytes through offset + (height - 1) * stride +\n    width_in_bytes, with only a WARN_ON(dst_stride < width_in_bytes),\n    and could likewise step past the end of either mapping.\n\nThe offsets and strides are derived from STDU/SOU plane state, so a\nconfigured CRTC submitting a crafted atomic commit on an imported\nframebuffer can reach this path.\n\nValidate the exact row-copy endpoint against each BO's size up front\nusing check_mul_overflow() and check_add_overflow().  Use the bulk\nmemcpy() path only when width_in_bytes covers the whole stride;\notherwise copy one row at a time so partial-row updates near the bottom\nof a framebuffer remain valid.  Also reject zero strides and stride <\nwidth_in_bytes, both of which the row-by-row path cannot represent\nsafely.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:55","updated_at":"2026-08-28 08:16:55"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e7b25a6011781ebfdbc458552cae6d4156732771","name":"https://git.kernel.org/stable/c/e7b25a6011781ebfdbc458552cae6d4156732771","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/706c93c5813caabbb0d0a576c017d15aeec2c113","name":"https://git.kernel.org/stable/c/706c93c5813caabbb0d0a576c017d15aeec2c113","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e4a2d15637a906cbd9bc98e0bf969f5f713e344","name":"https://git.kernel.org/stable/c/5e4a2d15637a906cbd9bc98e0bf969f5f713e344","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/042ca38779554687fc32b66a28328e0d9a36c58f","name":"https://git.kernel.org/stable/c/042ca38779554687fc32b66a28328e0d9a36c58f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4e0f669e2951b742239c6fe847fcc406fe78748d","name":"https://git.kernel.org/stable/c/4e0f669e2951b742239c6fe847fcc406fe78748d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80700","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80700","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4 4e0f669e2951b742239c6fe847fcc406fe78748d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 50f1199250912568606b3778dc56646c10cb7b04 e7b25a6011781ebfdbc458552cae6d4156732771 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 50f1199250912568606b3778dc56646c10cb7b04 042ca38779554687fc32b66a28328e0d9a36c58f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 50f1199250912568606b3778dc56646c10cb7b04 5e4a2d15637a906cbd9bc98e0bf969f5f713e344 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 50f1199250912568606b3778dc56646c10cb7b04 706c93c5813caabbb0d0a576c017d15aeec2c113 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.49 6.6.151 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10.8 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_blit.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4e0f669e2951b742239c6fe847fcc406fe78748d","status":"affected","version":"9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4","versionType":"git"},{"lessThan":"e7b25a6011781ebfdbc458552cae6d4156732771","status":"affected","version":"50f1199250912568606b3778dc56646c10cb7b04","versionType":"git"},{"lessThan":"042ca38779554687fc32b66a28328e0d9a36c58f","status":"affected","version":"50f1199250912568606b3778dc56646c10cb7b04","versionType":"git"},{"lessThan":"5e4a2d15637a906cbd9bc98e0bf969f5f713e344","status":"affected","version":"50f1199250912568606b3778dc56646c10cb7b04","versionType":"git"},{"lessThan":"706c93c5813caabbb0d0a576c017d15aeec2c113","status":"affected","version":"50f1199250912568606b3778dc56646c10cb7b04","versionType":"git"},{"status":"affected","version":"5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854","versionType":"git"},{"lessThan":"6.6.151","status":"affected","version":"6.6.49","versionType":"semver"},{"lessThan":"6.11","status":"affected","version":"6.10.8","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/vmwgfx/vmwgfx_blit.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"6.6.49","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate external BO copy bounds for both stride paths\n\nvmw_external_bo_copy() trusts caller-supplied offsets, strides, and\nheights and operates on imported dma-buf vmaps:\n\n  - The equal-stride memcpy() bound was clamped after subtracting the\n    offsets from dst_size and src_size; an offset larger than the BO\n    size wraps the unsigned subtraction to a huge value and the\n    resulting memcpy() runs off the end of the vmap.  dst_stride *\n    height is also a u32 multiplication that can overflow.\n  - The non-equal-stride row-by-row path had no bound at all.  The\n    loop touches bytes through offset + (height - 1) * stride +\n    width_in_bytes, with only a WARN_ON(dst_stride < width_in_bytes),\n    and could likewise step past the end of either mapping.\n\nThe offsets and strides are derived from STDU/SOU plane state, so a\nconfigured CRTC submitting a crafted atomic commit on an imported\nframebuffer can reach this path.\n\nValidate the exact row-copy endpoint against each BO's size up front\nusing check_mul_overflow() and check_add_overflow().  Use the bulk\nmemcpy() path only when width_in_bytes covers the whole stride;\notherwise copy one row at a time so partial-row updates near the bottom\nof a framebuffer remain valid.  Also reject zero strides and stride <\nwidth_in_bytes, both of which the row-by-row path cannot represent\nsafely."}],"providerMetadata":{"dateUpdated":"2026-08-28T06:53:04.050Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4e0f669e2951b742239c6fe847fcc406fe78748d"},{"url":"https://git.kernel.org/stable/c/e7b25a6011781ebfdbc458552cae6d4156732771"},{"url":"https://git.kernel.org/stable/c/042ca38779554687fc32b66a28328e0d9a36c58f"},{"url":"https://git.kernel.org/stable/c/5e4a2d15637a906cbd9bc98e0bf969f5f713e344"},{"url":"https://git.kernel.org/stable/c/706c93c5813caabbb0d0a576c017d15aeec2c113"}],"title":"drm/vmwgfx: validate external BO copy bounds for both stride paths","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80700","datePublished":"2026-08-28T06:53:04.050Z","dateReserved":"2026-08-26T14:34:25.786Z","dateUpdated":"2026-08-28T06:53:04.050Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:55","lastModifiedDate":"2026-08-28 08:16:55","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80700","Ordinal":"1","Title":"drm/vmwgfx: validate external BO copy bounds for both stride pat","CVE":"CVE-2026-80700","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80700","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: validate external BO copy bounds for both stride paths\n\nvmw_external_bo_copy() trusts caller-supplied offsets, strides, and\nheights and operates on imported dma-buf vmaps:\n\n  - The equal-stride memcpy() bound was clamped after subtracting the\n    offsets from dst_size and src_size; an offset larger than the BO\n    size wraps the unsigned subtraction to a huge value and the\n    resulting memcpy() runs off the end of the vmap.  dst_stride *\n    height is also a u32 multiplication that can overflow.\n  - The non-equal-stride row-by-row path had no bound at all.  The\n    loop touches bytes through offset + (height - 1) * stride +\n    width_in_bytes, with only a WARN_ON(dst_stride < width_in_bytes),\n    and could likewise step past the end of either mapping.\n\nThe offsets and strides are derived from STDU/SOU plane state, so a\nconfigured CRTC submitting a crafted atomic commit on an imported\nframebuffer can reach this path.\n\nValidate the exact row-copy endpoint against each BO's size up front\nusing check_mul_overflow() and check_add_overflow().  Use the bulk\nmemcpy() path only when width_in_bytes covers the whole stride;\notherwise copy one row at a time so partial-row updates near the bottom\nof a framebuffer remain valid.  Also reject zero strides and stride <\nwidth_in_bytes, both of which the row-by-row path cannot represent\nsafely.","Type":"Description","Title":"drm/vmwgfx: validate external BO copy bounds for both stride pat"}]}}}