219 lines
11 KiB
JSON
219 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-46709",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-09-11T15:12:18.252Z",
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"datePublished": "2024-09-13T06:33:41.392Z",
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"dateUpdated": "2026-08-05T11:38:04.182Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:38:04.182Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/vmwgfx/vmwgfx_blit.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
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"drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c"
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],
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"versions": [
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{
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"version": "65674218b43f2dd54587ab2b06560e17c30d8b41",
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"lessThan": "9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b32233accefff1338806f064fb9b62cf5bc0609f",
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"lessThan": "5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "b32233accefff1338806f064fb9b62cf5bc0609f",
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"lessThan": "50f1199250912568606b3778dc56646c10cb7b04",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2cdb71c975a10b8774fcd199f16f9ea88948de50",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.6.29",
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"lessThan": "6.6.49",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.8.8",
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"lessThan": "6.9",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/vmwgfx/vmwgfx_blit.c",
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"drivers/gpu/drm/vmwgfx/vmwgfx_drv.h",
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"drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c"
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],
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"versions": [
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{
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"version": "6.9",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.9",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.49",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.8",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6.29",
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"versionEndExcluding": "6.6.49"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.9",
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"versionEndExcluding": "6.10.8"
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.9",
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"versionEndExcluding": "6.11"
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{
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"vulnerable": true,
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4"
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},
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{
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"url": "https://git.kernel.org/stable/c/5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854"
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},
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{
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"url": "https://git.kernel.org/stable/c/50f1199250912568606b3778dc56646c10cb7b04"
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}
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],
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"title": "drm/vmwgfx: Fix prime with external buffers",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-29T15:00:04.048988Z",
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"id": "CVE-2024-46709",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-29T15:00:18.143Z"
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}
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}
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]
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}
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} |