{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23227", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.987Z", "datePublished": "2026-02-18T14:53:30.784Z", "dateUpdated": "2026-08-05T12:20:45.582Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:20:45.582Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free\n\nExynos Virtual Display driver performs memory alloc/free operations\nwithout lock protection, which easily causes concurrency problem.\n\nFor example, use-after-free can occur in race scenario like this:\n```\n\tCPU0\t\t\t\tCPU1\t\t\t\tCPU2\n\t----\t\t\t\t----\t\t\t\t----\n vidi_connection_ioctl()\n if (vidi->connection) // true\n drm_edid = drm_edid_alloc(); // alloc drm_edid\n ...\n ctx->raw_edid = drm_edid;\n ...\n\t\t\t\t\t\t\t\tdrm_mode_getconnector()\n\t\t\t\t\t\t\t\t drm_helper_probe_single_connector_modes()\n\t\t\t\t\t\t\t\t vidi_get_modes()\n\t\t\t\t\t\t\t\t if (ctx->raw_edid) // true\n\t\t\t\t\t\t\t\t drm_edid_dup(ctx->raw_edid);\n\t\t\t\t\t\t\t\t if (!drm_edid) // false\n\t\t\t\t\t\t\t\t ...\n\t\t\t\tvidi_connection_ioctl()\n\t\t\t\t if (vidi->connection) // false\n\t\t\t\t drm_edid_free(ctx->raw_edid); // free drm_edid\n\t\t\t\t ...\n\t\t\t\t\t\t\t\t drm_edid_alloc(drm_edid->edid)\n\t\t\t\t\t\t\t\t kmemdup(edid); // UAF!!\n\t\t\t\t\t\t\t\t ...\n```\n\nTo prevent these vulns, at least in vidi_context, member variables related\nto memory alloc/free should be protected with ctx->lock." } ], "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 - Requires local access to the DRM device node (/dev/dri/cardN) to issue the vidi_connection_ioctl and drm_mode_getconnector ioctls. Not reachable over network.\nAC:L - The attacker controls both sides of the race by issuing concurrent ioctls from multiple threads — one calling vidi_connection_ioctl to free raw_edid and another calling drm_mode_getconnector to read it.\nPR:L - The ioctl requires DRM_AUTH, which is granted to any process authenticated by the DRM master (display server). Any local user in a graphical session on an Exynos device has this access.\nUI:N - No victim action required; the attacker triggers the race entirely through their own concurrent ioctl calls.\nS:U - The vulnerability is in the kernel and impacts kernel memory; there is no crossing of a security boundary like VM escape or sandbox escape.\nC:H - The use-after-free allows reading freed memory via kmemdup on the reclaimed object, providing arbitrary memory read primitives when combined with heap spraying.\nI:H - The UAF enables heap spraying to reclaim the freed slot with attacker-controlled data, giving arbitrary write primitives and potential control flow hijacking for code execution.\nA:H - The use-after-free reliably causes kernel crashes (oops/panic) when the freed memory is accessed, providing a denial of service." } ] } ], "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_vidi.c" ], "versions": [ { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "56966a4cfa925ec24edb68ab652a740a7abe2c4d", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "9e1ef9396a1899925911b1729cb65665420268df", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "92dd1f38d7db75374dcdaf54f1d79d67bffd54e5", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "abfdf449fb3d7b42e85a1ad1c8694b768b1582f4", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "60b75407c172e1f341a8a5097c5cbc97dbbdd893", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385", "status": "affected", "versionType": "git" }, { "version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f", "lessThan": "52b330799e2d6f825ae2bb74662ec1b10eb954bb", "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_vidi.c" ], "versions": [ { "version": "3.6", "status": "affected" }, { "version": "0", "lessThan": "3.6", "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": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.11", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.1", "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": "3.6", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.12.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.18.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.19.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/56966a4cfa925ec24edb68ab652a740a7abe2c4d" }, { "url": "https://git.kernel.org/stable/c/9e1ef9396a1899925911b1729cb65665420268df" }, { "url": "https://git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5" }, { "url": "https://git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13" }, { "url": "https://git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4" }, { "url": "https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893" }, { "url": "https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385" }, { "url": "https://git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb" } ], "title": "drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free", "x_generator": { "engine": "bippy-1.2.0" } } } }