{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46709", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.252Z", "datePublished": "2024-09-13T06:33:41.392Z", "dateUpdated": "2026-08-05T11:38:04.182Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:04.182Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix prime with external buffers\n\nMake sure that for external buffers mapping goes through the dma_buf\ninterface instead of trying to access pages directly.\n\nExternal buffers might not provide direct access to readable/writable\npages so to make sure the bo's created from external dma_bufs can be\nread dma_buf interface has to be used.\n\nFixes crashes in IGT's kms_prime with vgem. Regular desktop usage won't\ntrigger this due to the fact that virtual machines will not have\nmultiple GPUs but it enables better test coverage in IGT." } ], "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 - Exploitation requires opening the vmwgfx DRM device node and issuing local ioctls (PRIME_FD_TO_HANDLE, ADDFB2, atomic modeset/DIRTYFB/VMW_PRESENT_READBACK). There is no network-reachable path into drivers/gpu/drm/vmwgfx.\nAC:L - The attacker performs every step deterministically — create/export an external dma-buf, import it into vmwgfx, build a framebuffer, and trigger the CPU blit via a modeset or present-readback; there is no race or memory-layout condition outside the attacker's control.\nPR:L - Only local unprivileged access to /dev/dri/card0 is needed; PRIME import is DRM_RENDER_ALLOW (no auth), and DRM master is granted automatically to the first opener of a master-less node, which any seat/video-group user obtains without root.\nUI:N - The attacking process creates the external dma-buf, imports it, adds the framebuffer and drives the modeset itself. No action by another user or administrator is required.\nS:U - The invalid page mappings and memcpy corruption stay inside the guest kernel's own security authority; this is a guest DRM driver bug, not a hypervisor or IOMMU boundary crossing.\nC:H - vmw_bo_cpu_blit_line() kmap_atomic()s attacker-influenced, non-CPU-mappable page pointers derived from the imported sg table and memcpys from them into the display surface's buffer, which userspace can read back via VMW_PRESENT_READBACK — disclosing arbitrary kernel memory.\nI:H - In the readback direction the external bo is the memcpy destination, so attacker-controlled framebuffer bytes are written through those bogus page pointers into unrelated kernel memory, giving a kernel write primitive.\nA:H - The maintainer states the change \"fixes crashes in IGT's kms_prime with vgem\"; dereferencing invalid page pointers under kmap_atomic (preemption and page faults disabled) reliably oopses or panics the kernel." } ] } ], "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", "drivers/gpu/drm/vmwgfx/vmwgfx_drv.h", "drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c" ], "versions": [ { "version": "65674218b43f2dd54587ab2b06560e17c30d8b41", "lessThan": "9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4", "status": "affected", "versionType": "git" }, { "version": "b32233accefff1338806f064fb9b62cf5bc0609f", "lessThan": "5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854", "status": "affected", "versionType": "git" }, { "version": "b32233accefff1338806f064fb9b62cf5bc0609f", "lessThan": "50f1199250912568606b3778dc56646c10cb7b04", "status": "affected", "versionType": "git" }, { "version": "2cdb71c975a10b8774fcd199f16f9ea88948de50", "status": "affected", "versionType": "git" }, { "version": "6.6.29", "lessThan": "6.6.49", "status": "affected", "versionType": "semver" }, { "version": "6.8.8", "lessThan": "6.9", "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", "drivers/gpu/drm/vmwgfx/vmwgfx_drv.h", "drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c" ], "versions": [ { "version": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.49", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.8", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "6.6.29", "versionEndExcluding": "6.6.49" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4" }, { "url": "https://git.kernel.org/stable/c/5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854" }, { "url": "https://git.kernel.org/stable/c/50f1199250912568606b3778dc56646c10cb7b04" } ], "title": "drm/vmwgfx: Fix prime with external buffers", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T15:00:04.048988Z", "id": "CVE-2024-46709", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T15:00:18.143Z" } } ] } }