298 lines
15 KiB
JSON
298 lines
15 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-2026-74444",
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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": "2026-08-15T05:44:03.898Z",
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"datePublished": "2026-08-15T12:26:51.443Z",
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"dateUpdated": "2026-10-16T19:05:45.890Z"
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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": "2026-08-19T16:36:38.535Z"
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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: validate DRAW_PRIMITIVES header size before division\n\nvmw_cmd_draw() computes\n\n\tmaxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);\n\nwhere header->size is u32 and is taken straight from the user-supplied\ncommand stream. When header->size is less than sizeof(cmd->body) the\nunsigned subtraction wraps to nearly 4 GiB, producing a huge maxnum.\nAny user-controlled cmd->body.numVertexDecls then passes the bound and\nthe loop dereferences decl[i] far past the end of the kernel command\nbounce buffer, producing an out-of-bounds read of kernel memory.\n\nReject undersized headers up front."
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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 - The bug is reached only through the local DRM_IOCTL_VMW_EXECBUF ioctl (vmw_execbuf_ioctl -> vmw_execbuf_process -> vmw_cmd_check_all -> vmw_cmd_draw); it is not reachable from network, adjacent wireless, or physical buses.\nAC:L - An attacker fully controls the user command stream and can set header->size below sizeof(cmd->body) to underflow maxnum and bypass numVertexDecls bounds; no races or victim-dependent timing are required.\nPR:L - VMW_EXECBUF is registered with DRM_RENDER_ALLOW, so any local process with access to the vmwgfx render node (/dev/dri/renderD*) and a user-created 3D context can submit the malicious DRAW_PRIMITIVES command without real root.\nUI:N - Exploitation requires only the attacker opening the render device and issuing crafted execbuf ioctls; no additional actions by another user or administrator are needed.\nS:U - Impact is confined to the guest kernel address space running vmwgfx (VMware SVGA virtual GPU); successful exploitation yields guest-kernel memory disclosure/corruption and privilege escalation, not a direct hypervisor/host escape.\nC:H - Unsigned underflow makes maxnum enormous, so the vertex-declaration loop dereferences decl[i] far beyond the vmalloc command bounce buffer and reads adjacent kernel heap memory (e.g., decl->array.surfaceId) into validation paths.\nI:H - Beyond disclosure, leaked/adjacent surfaceId values can satisfy vmw_user_resource_lookup_handle and vmw_resource_relocations_apply then writes resource IDs to offsets past the bounce buffer, giving an out-of-bounds kernel write primitive.\nA:H - Setting a large numVertexDecls after the bound bypass can walk far past the vmalloc allocation and fault on unmapped pages, and extensive heap corruption from relocation writes can also trigger kernel oops/panic."
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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_execbuf.c"
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],
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"versions": [
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{
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"version": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "b89ca4bba820f79dde52af15ee139fe6e8bbc314",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "bef30317fcb4c838a37bceb2fc76256eb6b975c1",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "112c6ff29a56f3a22db4d5af869697aa07035ad6",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "2666cddf0dd218aa9bd1f99db688d1b532eac21a",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "fc0c02f510e41650df3479f96e257acf87d8a20a",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "dc0be7662b7b0ce28cb5eea864737793ed7b9e70",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "c77cf8edae2bd3a1599115301cc7c98d0c78e731",
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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": "7a73ba7469cbea631050094fd14f73acebb97cf9",
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"lessThan": "85891d174707d8bddcec7a888fb4e1d17def34f3",
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"status": "affected",
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"versionType": "git"
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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_execbuf.c"
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],
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"versions": [
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{
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"version": "2.6.33",
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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": "2.6.33",
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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": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.151",
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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": "6.12.103",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.44",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "2.6.33",
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"versionEndExcluding": "5.10.265"
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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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"versionEndExcluding": "5.15.216"
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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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"versionEndExcluding": "6.1.183"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.6.151"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.33",
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"versionEndExcluding": "7.1.8"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/b89ca4bba820f79dde52af15ee139fe6e8bbc314"
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},
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{
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"url": "https://git.kernel.org/stable/c/bef30317fcb4c838a37bceb2fc76256eb6b975c1"
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},
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{
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"url": "https://git.kernel.org/stable/c/112c6ff29a56f3a22db4d5af869697aa07035ad6"
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},
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{
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"url": "https://git.kernel.org/stable/c/2666cddf0dd218aa9bd1f99db688d1b532eac21a"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc0c02f510e41650df3479f96e257acf87d8a20a"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc0be7662b7b0ce28cb5eea864737793ed7b9e70"
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},
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{
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"url": "https://git.kernel.org/stable/c/c77cf8edae2bd3a1599115301cc7c98d0c78e731"
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},
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{
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"url": "https://git.kernel.org/stable/c/85891d174707d8bddcec7a888fb4e1d17def34f3"
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}
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],
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"title": "drm/vmwgfx: validate DRAW_PRIMITIVES header size before division",
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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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"id": "CVE-2026-74444",
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"role": "CISA Coordinator",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:56:36.182833Z"
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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": "2026-10-16T19:05:45.890Z"
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}
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}
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]
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}
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} |