266 lines
14 KiB
JSON
266 lines
14 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-2026-45956",
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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": "2026-05-13T15:03:33.088Z",
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"datePublished": "2026-05-27T12:18:11.972Z",
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"dateUpdated": "2026-10-21T12:41:06.321Z"
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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": "2026-10-21T12:41:06.321Z"
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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/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()\n\nvidi_connection_ioctl() retrieves the driver_data from drm_dev->dev to\nobtain a struct vidi_context pointer. However, drm_dev->dev is the\nexynos-drm master device, and the driver_data contained therein is not\nthe vidi component device, but a completely different device.\n\nThis can lead to various bugs, ranging from null pointer dereferences and\ngarbage value accesses to, in unlucky cases, out-of-bounds errors,\nuse-after-free errors, and more.\n\nTo resolve this issue, we need to store/delete the vidi device pointer in\nexynos_drm_private->vidi_dev during bind/unbind, and then read this\nexynos_drm_private->vidi_dev within ioctl() to obtain the correct\nstruct vidi_context pointer."
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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 flaw is reached only through the Exynos DRM primary device node via DRM_IOCTL_EXYNOS_VIDI_CONNECTION (local ioctl path through drm_ioctl), not over the network.\nAC:L - Once the VIDI driver is enabled and the caller passes DRM_AUTH checks, every call uses the wrong context pointer deterministically; the attacker fully controls ioctl arguments and timing without external race luck.\nPR:L - Exploitation requires a local process that can open the primary DRM device and satisfy DRM_AUTH (authenticated DRM client or CAP_SYS_ADMIN, which includes user-namespace admin); it does not require init-namespace root, but unauthenticated users cannot reach the ioctl.\nUI:N - No victim interaction is required beyond the attacker (or their already-authenticated DRM client) issuing the malicious ioctl.\nS:U - Impact is kernel memory corruption and instability within the same kernel security domain; it is not a VM escape, IOMMU bypass, or cross-authority sandbox break.\nC:H - Type-confused reads/writes against a drm_device masquerading as vidi_context can dereference attacker-influenced garbage pointers and, on affected versions in the CVE window, companion paths also allowed unsafe EDID handling; per project guidance, UAF/wrong-free and uncontrolled reads warrant High confidentiality impact.\nI:H - The ioctl writes connection state and EDID pointers into misaligned drm_device fields and may call drm_edid_free() on attacker-influenced addresses, enabling arbitrary kernel memory corruption and potential control-flow hijack, not merely a benign crash.\nA:H - The fix and commit message document NULL dereferences, out-of-bounds access, and use-after-free outcomes that can oops or panic the kernel; any such crash maps to High availability impact."
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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/exynos/exynos_drm_drv.h",
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"drivers/gpu/drm/exynos/exynos_drm_vidi.c"
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],
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"versions": [
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{
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"version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "2987642c5213508c6c9e718324c0d5289a92c474",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "65d1213baffa363f2eb1117b1dc7acc573b890f8",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "875fa28690e93ed5296c31d3344556c6bb867234",
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"status": "affected",
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},
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{
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"version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "e1aed617eb80b49eac2f8c7bb7a0990f641dd59b",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "b5fc86d753dd4c281a943b92f0eef02d31af03d7",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "a540f767642f75240a6c35f6a65b69e44cfcea9d",
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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": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322",
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"lessThan": "d3968a0d85b211e197f2f4f06268a7031079e0d0",
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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/exynos/exynos_drm_drv.h",
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"drivers/gpu/drm/exynos/exynos_drm_vidi.c"
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],
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"versions": [
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{
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"version": "4.3",
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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": "4.3",
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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": "5.10.253",
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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": "5.15.203",
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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": "6.1.167",
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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": "6.6.130",
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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": "6.12.114",
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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": "6.18.14",
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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": "6.19.4",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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": "4.3",
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"versionEndExcluding": "5.10.253"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2987642c5213508c6c9e718324c0d5289a92c474"
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},
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{
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"url": "https://git.kernel.org/stable/c/65d1213baffa363f2eb1117b1dc7acc573b890f8"
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},
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{
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"url": "https://git.kernel.org/stable/c/875fa28690e93ed5296c31d3344556c6bb867234"
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},
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{
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"url": "https://git.kernel.org/stable/c/21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d"
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},
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{
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"url": "https://git.kernel.org/stable/c/e1aed617eb80b49eac2f8c7bb7a0990f641dd59b"
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},
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{
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"url": "https://git.kernel.org/stable/c/b5fc86d753dd4c281a943b92f0eef02d31af03d7"
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},
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{
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"url": "https://git.kernel.org/stable/c/a540f767642f75240a6c35f6a65b69e44cfcea9d"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3968a0d85b211e197f2f4f06268a7031079e0d0"
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}
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],
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"title": "drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()",
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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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}
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} |