{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-45956", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.088Z", "datePublished": "2026-05-27T12:18:11.972Z", "dateUpdated": "2026-08-05T12:28:55.314Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:28:55.314Z" }, "descriptions": [ { "lang": "en", "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." } ], "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 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/exynos/exynos_drm_drv.h", "drivers/gpu/drm/exynos/exynos_drm_vidi.c" ], "versions": [ { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "2987642c5213508c6c9e718324c0d5289a92c474", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "65d1213baffa363f2eb1117b1dc7acc573b890f8", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "875fa28690e93ed5296c31d3344556c6bb867234", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "b5fc86d753dd4c281a943b92f0eef02d31af03d7", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "a540f767642f75240a6c35f6a65b69e44cfcea9d", "status": "affected", "versionType": "git" }, { "version": "cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322", "lessThan": "d3968a0d85b211e197f2f4f06268a7031079e0d0", "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/gpu/drm/exynos/exynos_drm_drv.h", "drivers/gpu/drm/exynos/exynos_drm_vidi.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.3", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.19.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2987642c5213508c6c9e718324c0d5289a92c474" }, { "url": "https://git.kernel.org/stable/c/65d1213baffa363f2eb1117b1dc7acc573b890f8" }, { "url": "https://git.kernel.org/stable/c/875fa28690e93ed5296c31d3344556c6bb867234" }, { "url": "https://git.kernel.org/stable/c/21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d" }, { "url": "https://git.kernel.org/stable/c/b5fc86d753dd4c281a943b92f0eef02d31af03d7" }, { "url": "https://git.kernel.org/stable/c/a540f767642f75240a6c35f6a65b69e44cfcea9d" }, { "url": "https://git.kernel.org/stable/c/d3968a0d85b211e197f2f4f06268a7031079e0d0" } ], "title": "drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()", "x_generator": { "engine": "bippy-1.2.0" } } } }