{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80700", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.786Z", "datePublished": "2026-08-28T06:53:04.050Z", "dateUpdated": "2026-10-16T19:26:33.894Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:22:20.794Z" }, "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is reached only via local DRM KMS ioctls on /dev/dri/card0: DRM_IOCTL_MODE_ATOMIC drives STDU/SOU plane updates that call vmw_bo_cpu_blit() -> vmw_external_bo_copy(); vmwgfx is not exposed through any network, adjacent-radio, or physical-bus interface.\nAC:L - An attacker with DRM master fully controls atomic plane state, damage clips, pitches, and prime-imported framebuffer geometry that derive dst/src offsets, strides, and height; crafted values reliably trigger unsigned wrap or unbounded row copies without races or victim-dependent layout.\nPR:L - DRM_IOCTL_MODE_ATOMIC is gated by DRM_MASTER, not real root; on VMware guests and VDI desktops the logged-in session user holding master (typical video/render group access) can prime-import a dma-buf, configure a CRTC, and submit the malicious atomic commit.\nUI:N - Exploitation requires only the attacker opening the DRM device and issuing crafted atomic commits with an imported framebuffer; no actions by another user such as mounting filesystems or opening files are needed.\nS:U - Out-of-bounds memcpy corrupts adjacent guest-kernel memory around imported dma-buf vmaps and internal display BO mappings, enabling guest-kernel privilege escalation; impact stays within the guest kernel security domain and does not directly cross a VM/host or IOMMU boundary.\nC:H - The bug performs unchecked memcpy from attacker-influenced source mappings past buffer ends (equal-stride unsigned underflow and unbounded row-by-row copies), yielding an out-of-bounds kernel read primitive that can disclose adjacent heap/vmalloc data including kernel pointers.\nI:H - The same unchecked copies write past the end of destination vmaps, providing an out-of-bounds kernel write primitive that can corrupt adjacent objects and be developed into arbitrary memory modification or code execution.\nA:H - Large out-of-bounds memcpy operations can immediately corrupt critical kernel structures or touch unmapped pages, causing kernel oops/panic; the atomic-commit trigger can be repeated to deny availability after reboot." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/vmwgfx/vmwgfx_blit.c" ], "versions": [ { "version": "9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4", "lessThan": "4e0f669e2951b742239c6fe847fcc406fe78748d", "status": "affected", "versionType": "git" }, { "version": "50f1199250912568606b3778dc56646c10cb7b04", "lessThan": "e7b25a6011781ebfdbc458552cae6d4156732771", "status": "affected", "versionType": "git" }, { "version": "50f1199250912568606b3778dc56646c10cb7b04", "lessThan": "042ca38779554687fc32b66a28328e0d9a36c58f", "status": "affected", "versionType": "git" }, { "version": "50f1199250912568606b3778dc56646c10cb7b04", "lessThan": "5e4a2d15637a906cbd9bc98e0bf969f5f713e344", "status": "affected", "versionType": "git" }, { "version": "50f1199250912568606b3778dc56646c10cb7b04", "lessThan": "706c93c5813caabbb0d0a576c017d15aeec2c113", "status": "affected", "versionType": "git" }, { "version": "5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854", "status": "affected", "versionType": "git" }, { "version": "6.6.49", "lessThan": "6.6.151", "status": "affected", "versionType": "semver" }, { "version": "6.10.8", "lessThan": "6.11", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/vmwgfx/vmwgfx_blit.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "6.6.49", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.8" } ] } ] } ], "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" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80700", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:20:14.904770Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:33.894Z" } } ] } }