{ "schema_version": "1.6.1", "id": "RPI-CVE-2023-53454", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2023-53454" ], "published": "2025-10-01T11:43:29Z", "summary": "HID: multitouch: Correct devm device reference for hidinput input_dev name", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: Correct devm device reference for hidinput input_dev name\n\nReference the HID device rather than the input device for the devm\nallocation of the input_dev name. Referencing the input_dev would lead to a\nuse-after-free when the input_dev was unregistered and subsequently fires a\nuevent that depends on the name. At the point of firing the uevent, the\nname would be freed by devres management.\n\nUse devm_kasprintf to simplify the logic for allocating memory and\nformatting the input_dev name string.", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.1.21-1+rpt1", "1:6.1.47-1+rpt2", "1:6.1.47-1+rpt4" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.1.0-rpi1-rpi-v6", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v8", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v6", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7l", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v8", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-2712", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v6", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l", "binary_version": "1:6.1.47-1+rpt4" }, { "binary_name": "linux-image-6.1.0-rpi3-rpi-v8", "binary_version": "1:6.1.47-1+rpt4" } ] }, "database_specific": { "per_version": { "1:6.1.21-1+rpt1": { "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed", "upstream_version": "6.1.21", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.53" }, "1:6.1.47-1+rpt2": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.53" }, "1:6.1.47-1+rpt4": { "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e", "upstream_version": "6.1.47", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.53", "compiled_filter": false } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2023-53454" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/ac0d389402a6ff9ad92cea02c2d8c711483b91ab" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/39c70c19456e50dcb3abfe53539220dff0490f1d" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/df7ca43fe090e1a56c216c8ebc106ef5fd49afc6" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/15ec7cb55e7d88755aa01d44a7a1015a42bfce86" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/dde88ab4e45beb60b217026207aa9c14c88d71ab" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/2763732ec1e68910719c75b6b896e11b6d3d622b" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/1d7833db9fd118415dace2ca157bfa603dec9c8c" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/b70ac7849248ec8128fa12f86e3655ba38838f29" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/4794394635293a3e74591351fff469cea7ad15a2" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-08-05T11:24:39Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 8.8, "cvss_v3_severity": "High", "scenario": "AV:A - hid-multitouch explicitly binds Bluetooth HID multitouch devices (MT_BT_DEVICE, BUS_BLUETOOTH, and HID_BUS_ANY catch-alls), so an in-range attacker can connect a crafted Bluetooth HID multitouch device and disconnect it to trigger the UAF; Adjacent is higher severity than the USB-only Physical path.\nAC:L - An attacker-controlled HID report descriptor with ContactID (to select HID_GROUP_MULTITOUCH) plus an unrecognized application collection forces the \"UNKNOWN\" suffix allocation, and disconnect reliably hits device_del's free-then-uevent ordering with no race beyond the attacker's control.\nPR:N - Bluetooth HID enumeration and driver bind/unbind run from kernel hotplug with no account, capability, or authentication on the target; the attacker needs no local privileges on the victim system.\nUI:N - The attacker performs connect and disconnect themselves (or via Just Works / auto-reconnect HID pairing), and the kernel probe/teardown path fires the uevent without requiring the victim to open a file or otherwise interact.\nS:U - The use-after-free corrupts kernel heap state within the same OS security authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The freed input_dev name string is read via %s into the KOBJ_REMOVE uevent, so a groomed reallocation of the kmalloc object yields disclosure of attacker-chosen heap contents; kernel UAF is scored High confidentiality.\nI:H - The UAF is a sprayable kmalloc object whose dangling pointer is consumed during teardown; heap grooming enables overlapping objects and control-flow/write primitives, so integrity impact is High per UAF guidance.\nA:H - Use of the freed name during uevent generation reliably produces a kernel oops/panic (or KASAN slab-use-after-free), and the attacker can repeat connect/disconnect at will." } } }