201 lines
11 KiB
JSON
201 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-2022-50745",
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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": "2025-12-24T13:02:21.543Z",
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"datePublished": "2025-12-24T13:05:41.858Z",
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"dateUpdated": "2026-08-05T08:59:34.782Z"
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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": "2026-08-05T08:59:34.782Z"
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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\nstaging: media: tegra-video: fix device_node use after free\n\nAt probe time this code path is followed:\n\n * tegra_csi_init\n * tegra_csi_channels_alloc\n * for_each_child_of_node(node, channel) -- iterates over channels\n * automatically gets 'channel'\n * tegra_csi_channel_alloc()\n * saves into chan->of_node a pointer to the channel OF node\n * automatically gets and puts 'channel'\n * now the node saved in chan->of_node has refcount 0, can disappear\n * tegra_csi_channels_init\n * iterates over channels\n * tegra_csi_channel_init -- uses chan->of_node\n\nAfter that, chan->of_node keeps storing the node until the device is\nremoved.\n\nof_node_get() the node and of_node_put() it during teardown to avoid any\nrisk."
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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 defect is reached only on the local Tegra CSI platform probe path (tegra_csi_probe → host1x_client_register → tegra_csi_init → tegra_csi_channels_alloc/init) when parsing DT channel children; it is not reachable via network or adjacent-link packet processing.\nAC:L - for_each_child_of_node drops its temporary reference after each channel allocation, and the missing of_node_get leaves a long-lived dangling pointer deterministically on every non-TPG probe with channel nodes; on OF_DYNAMIC/overlay Tegra camera setups the node can be freed while still referenced with no attacker-uncontrollable race.\nPR:L - The buggy path runs automatically during ordinary boot-time/driver probe on affected Tegra210 VIDEO_TEGRA DT configurations with no capability gate, and per the higher-severity reading used for similar probe-time of_node UAF bugs a basic local user is scored rather than requiring init-namespace root.\nUI:N - Channel allocation and tegra_csi_channel_init run as part of normal host1x/video device initialization; no separate victim action such as mounting a filesystem or opening a device is required.\nS:U - The corrupted object is a kernel device_node used by the tegra-video CSI subdev within the host kernel’s security authority; this is ordinary kernel memory-safety impact, not a VM escape or IOMMU/sandbox boundary cross.\nC:H - Holding chan->of_node (and subdev->fwnode derived from it) after the iterator’s of_node_put without of_node_get is a use-after-free on the device_node; per UAF guidance that enables heap reuse and arbitrary kernel disclosure.\nI:H - The same device_node UAF is a heap-spray target whose freed object fields can be overwritten, converting the dangling OF/fwnode reference into an arbitrary-write and control-flow hijack primitive.\nA:H - Use of the dangling of_node (e.g. full_name / fwnode after free, or later teardown) causes kernel oops/panic, and UAFs are scored Availability High even when not fully exploited."
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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/staging/media/tegra-video/csi.c"
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],
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"status": "affected",
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"version": "1ebaeb09830f36c1111b72a95420814225bd761c",
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"lessThan": "ce50c612458091d926ccb05d7db11d9f93532db2",
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"status": "affected",
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{
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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/staging/media/tegra-video/csi.c"
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],
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"versions": [
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{
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"version": "5.10",
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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": "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": "5.10.163",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"status": "unaffected",
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},
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"version": "6.0.18",
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"lessThanOrEqual": "6.0.*",
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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": "6.1.4",
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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": "6.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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