{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50745", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T13:02:21.543Z", "datePublished": "2025-12-24T13:05:41.858Z", "dateUpdated": "2026-08-05T08:59:34.782Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:34.782Z" }, "descriptions": [ { "lang": "en", "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." } ], "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 - 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/media/tegra-video/csi.c" ], "versions": [ { "version": "1ebaeb09830f36c1111b72a95420814225bd761c", "lessThan": "5451efb2ca30f3c42b9efb8327ce35b62870dbd3", "status": "affected", "versionType": "git" }, { "version": "1ebaeb09830f36c1111b72a95420814225bd761c", "lessThan": "ce50c612458091d926ccb05d7db11d9f93532db2", "status": "affected", "versionType": "git" }, { "version": "1ebaeb09830f36c1111b72a95420814225bd761c", "lessThan": "6512c9498fcb97e7c760e3ef86b2272f2c0f765f", "status": "affected", "versionType": "git" }, { "version": "1ebaeb09830f36c1111b72a95420814225bd761c", "lessThan": "0fd003d3c708c80350a815eaf37b8e1114b976cf", "status": "affected", "versionType": "git" }, { "version": "1ebaeb09830f36c1111b72a95420814225bd761c", "lessThan": "c4d344163c3a7f90712525f931a6c016bbb35e18", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/media/tegra-video/csi.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.87", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.18", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.4", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "5.10", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.87" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.0.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5451efb2ca30f3c42b9efb8327ce35b62870dbd3" }, { "url": "https://git.kernel.org/stable/c/ce50c612458091d926ccb05d7db11d9f93532db2" }, { "url": "https://git.kernel.org/stable/c/6512c9498fcb97e7c760e3ef86b2272f2c0f765f" }, { "url": "https://git.kernel.org/stable/c/0fd003d3c708c80350a815eaf37b8e1114b976cf" }, { "url": "https://git.kernel.org/stable/c/c4d344163c3a7f90712525f931a6c016bbb35e18" } ], "title": "staging: media: tegra-video: fix device_node use after free", "x_generator": { "engine": "bippy-1.2.0" } } } }