CVE-2025-39824 (GCVE-0-2025-39824)
Vulnerability from cvelistv5 – Published: 2025-09-16 13:00 – Updated: 2026-05-12 12:07
VLAI
EPSS
VEX
Title
HID: asus: fix UAF via HID_CLAIMED_INPUT validation
Summary
In the Linux kernel, the following vulnerability has been resolved:
HID: asus: fix UAF via HID_CLAIMED_INPUT validation
After hid_hw_start() is called hidinput_connect() will eventually be
called to set up the device with the input layer since the
HID_CONNECT_DEFAULT connect mask is used. During hidinput_connect()
all input and output reports are processed and corresponding hid_inputs
are allocated and configured via hidinput_configure_usages(). This
process involves slot tagging report fields and configuring usages
by setting relevant bits in the capability bitmaps. However it is possible
that the capability bitmaps are not set at all leading to the subsequent
hidinput_has_been_populated() check to fail leading to the freeing of the
hid_input and the underlying input device.
This becomes problematic because a malicious HID device like a
ASUS ROG N-Key keyboard can trigger the above scenario via a
specially crafted descriptor which then leads to a user-after-free
when the name of the freed input device is written to later on after
hid_hw_start(). Below, report 93 intentionally utilises the
HID_UP_UNDEFINED Usage Page which is skipped during usage
configuration, leading to the frees.
0x05, 0x0D, // Usage Page (Digitizer)
0x09, 0x05, // Usage (Touch Pad)
0xA1, 0x01, // Collection (Application)
0x85, 0x0D, // Report ID (13)
0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
0x09, 0xC5, // Usage (0xC5)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x04, // Report Count (4)
0xB1, 0x02, // Feature (Data,Var,Abs)
0x85, 0x5D, // Report ID (93)
0x06, 0x00, 0x00, // Usage Page (Undefined)
0x09, 0x01, // Usage (0x01)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x1B, // Report Count (27)
0x81, 0x02, // Input (Data,Var,Abs)
0xC0, // End Collection
Below is the KASAN splat after triggering the UAF:
[ 21.672709] ==================================================================
[ 21.673700] BUG: KASAN: slab-use-after-free in asus_probe+0xeeb/0xf80
[ 21.673700] Write of size 8 at addr ffff88810a0ac000 by task kworker/1:2/54
[ 21.673700]
[ 21.673700] CPU: 1 UID: 0 PID: 54 Comm: kworker/1:2 Not tainted 6.16.0-rc4-g9773391cf4dd-dirty #36 PREEMPT(voluntary)
[ 21.673700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 21.673700] Call Trace:
[ 21.673700] <TASK>
[ 21.673700] dump_stack_lvl+0x5f/0x80
[ 21.673700] print_report+0xd1/0x660
[ 21.673700] kasan_report+0xe5/0x120
[ 21.673700] __asan_report_store8_noabort+0x1b/0x30
[ 21.673700] asus_probe+0xeeb/0xf80
[ 21.673700] hid_device_probe+0x2ee/0x700
[ 21.673700] really_probe+0x1c6/0x6b0
[ 21.673700] __driver_probe_device+0x24f/0x310
[ 21.673700] driver_probe_device+0x4e/0x220
[...]
[ 21.673700]
[ 21.673700] Allocated by task 54:
[ 21.673700] kasan_save_stack+0x3d/0x60
[ 21.673700] kasan_save_track+0x18/0x40
[ 21.673700] kasan_save_alloc_info+0x3b/0x50
[ 21.673700] __kasan_kmalloc+0x9c/0xa0
[ 21.673700] __kmalloc_cache_noprof+0x139/0x340
[ 21.673700] input_allocate_device+0x44/0x370
[ 21.673700] hidinput_connect+0xcb6/0x2630
[ 21.673700] hid_connect+0xf74/0x1d60
[ 21.673700] hid_hw_start+0x8c/0x110
[ 21.673700] asus_probe+0x5a3/0xf80
[ 21.673700] hid_device_probe+0x2ee/0x700
[ 21.673700] really_probe+0x1c6/0x6b0
[ 21.673700] __driver_probe_device+0x24f/0x310
[ 21.673700] driver_probe_device+0x4e/0x220
[...]
[ 21.673700]
[ 21.673700] Freed by task 54:
[ 21.673700] kasan_save_stack+0x3d/0x60
[ 21.673700] kasan_save_track+0x18/0x40
[ 21.673700] kasan_save_free_info+0x3f/0x60
[ 21.673700] __kasan_slab_free+0x3c/0x50
[ 21.673700] kfre
---truncated---
Severity
7.8 (High)
Assigner
References
11 references
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
9ce12d8be12c94334634dd57050444910415e45f , < 9a9e4a8317437bf944fa017c66e1e23a0368b5c7
(git)
Affected: 9ce12d8be12c94334634dd57050444910415e45f , < 7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5 (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < eaae728e7335b5dbad70966e2bd520a731fdf7b2 (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < a8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < 5f3c0839b173f7f33415eb098331879e547d1d2d (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < c0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < 72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275 (git) Affected: 9ce12d8be12c94334634dd57050444910415e45f , < d3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4 (git) |
guessed | |
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 5.4.298 , ≤ 5.4.* (semver) Unaffected: 5.10.242 , ≤ 5.10.* (semver) Unaffected: 5.15.191 , ≤ 5.15.* (semver) Unaffected: 6.1.150 , ≤ 6.1.* (semver) Unaffected: 6.6.104 , ≤ 6.6.* (semver) Unaffected: 6.12.45 , ≤ 6.12.* (semver) Unaffected: 6.16.5 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
guessed |
{
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: asus: fix UAF via HID_CLAIMED_INPUT validation\n\nAfter hid_hw_start() is called hidinput_connect() will eventually be\ncalled to set up the device with the input layer since the\nHID_CONNECT_DEFAULT connect mask is used. During hidinput_connect()\nall input and output reports are processed and corresponding hid_inputs\nare allocated and configured via hidinput_configure_usages(). This\nprocess involves slot tagging report fields and configuring usages\nby setting relevant bits in the capability bitmaps. However it is possible\nthat the capability bitmaps are not set at all leading to the subsequent\nhidinput_has_been_populated() check to fail leading to the freeing of the\nhid_input and the underlying input device.\n\nThis becomes problematic because a malicious HID device like a\nASUS ROG N-Key keyboard can trigger the above scenario via a\nspecially crafted descriptor which then leads to a user-after-free\nwhen the name of the freed input device is written to later on after\nhid_hw_start(). Below, report 93 intentionally utilises the\nHID_UP_UNDEFINED Usage Page which is skipped during usage\nconfiguration, leading to the frees.\n\n0x05, 0x0D, // Usage Page (Digitizer)\n0x09, 0x05, // Usage (Touch Pad)\n0xA1, 0x01, // Collection (Application)\n0x85, 0x0D, // Report ID (13)\n0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)\n0x09, 0xC5, // Usage (0xC5)\n0x15, 0x00, // Logical Minimum (0)\n0x26, 0xFF, 0x00, // Logical Maximum (255)\n0x75, 0x08, // Report Size (8)\n0x95, 0x04, // Report Count (4)\n0xB1, 0x02, // Feature (Data,Var,Abs)\n0x85, 0x5D, // Report ID (93)\n0x06, 0x00, 0x00, // Usage Page (Undefined)\n0x09, 0x01, // Usage (0x01)\n0x15, 0x00, // Logical Minimum (0)\n0x26, 0xFF, 0x00, // Logical Maximum (255)\n0x75, 0x08, // Report Size (8)\n0x95, 0x1B, // Report Count (27)\n0x81, 0x02, // Input (Data,Var,Abs)\n0xC0, // End Collection\n\nBelow is the KASAN splat after triggering the UAF:\n\n[ 21.672709] ==================================================================\n[ 21.673700] BUG: KASAN: slab-use-after-free in asus_probe+0xeeb/0xf80\n[ 21.673700] Write of size 8 at addr ffff88810a0ac000 by task kworker/1:2/54\n[ 21.673700]\n[ 21.673700] CPU: 1 UID: 0 PID: 54 Comm: kworker/1:2 Not tainted 6.16.0-rc4-g9773391cf4dd-dirty #36 PREEMPT(voluntary)\n[ 21.673700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014\n[ 21.673700] Call Trace:\n[ 21.673700] \u003cTASK\u003e\n[ 21.673700] dump_stack_lvl+0x5f/0x80\n[ 21.673700] print_report+0xd1/0x660\n[ 21.673700] kasan_report+0xe5/0x120\n[ 21.673700] __asan_report_store8_noabort+0x1b/0x30\n[ 21.673700] asus_probe+0xeeb/0xf80\n[ 21.673700] hid_device_probe+0x2ee/0x700\n[ 21.673700] really_probe+0x1c6/0x6b0\n[ 21.673700] __driver_probe_device+0x24f/0x310\n[ 21.673700] driver_probe_device+0x4e/0x220\n[...]\n[ 21.673700]\n[ 21.673700] Allocated by task 54:\n[ 21.673700] kasan_save_stack+0x3d/0x60\n[ 21.673700] kasan_save_track+0x18/0x40\n[ 21.673700] kasan_save_alloc_info+0x3b/0x50\n[ 21.673700] __kasan_kmalloc+0x9c/0xa0\n[ 21.673700] __kmalloc_cache_noprof+0x139/0x340\n[ 21.673700] input_allocate_device+0x44/0x370\n[ 21.673700] hidinput_connect+0xcb6/0x2630\n[ 21.673700] hid_connect+0xf74/0x1d60\n[ 21.673700] hid_hw_start+0x8c/0x110\n[ 21.673700] asus_probe+0x5a3/0xf80\n[ 21.673700] hid_device_probe+0x2ee/0x700\n[ 21.673700] really_probe+0x1c6/0x6b0\n[ 21.673700] __driver_probe_device+0x24f/0x310\n[ 21.673700] driver_probe_device+0x4e/0x220\n[...]\n[ 21.673700]\n[ 21.673700] Freed by task 54:\n[ 21.673700] kasan_save_stack+0x3d/0x60\n[ 21.673700] kasan_save_track+0x18/0x40\n[ 21.673700] kasan_save_free_info+0x3f/0x60\n[ 21.673700] __kasan_slab_free+0x3c/0x50\n[ 21.673700] kfre\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:37:04.375Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/9a9e4a8317437bf944fa017c66e1e23a0368b5c7"
},
{
"url": "https://git.kernel.org/stable/c/7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5"
},
{
"url": "https://git.kernel.org/stable/c/eaae728e7335b5dbad70966e2bd520a731fdf7b2"
},
{
"url": "https://git.kernel.org/stable/c/a8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c"
},
{
"url": "https://git.kernel.org/stable/c/5f3c0839b173f7f33415eb098331879e547d1d2d"
},
{
"url": "https://git.kernel.org/stable/c/c0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c"
},
{
"url": "https://git.kernel.org/stable/c/72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275"
},
{
"url": "https://git.kernel.org/stable/c/d3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4"
}
],
"title": "HID: asus: fix UAF via HID_CLAIMED_INPUT validation",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-39824",
"datePublished": "2025-09-16T13:00:23.135Z",
"dateReserved": "2025-04-16T07:20:57.139Z",
"dateUpdated": "2026-05-12T12:07:19.349Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-39824",
"date": "2026-09-19",
"epss": "0.00163",
"percentile": "0.05962"
},
"microsoft_vex": {
"current_release_date": "2026-02-24T14:41:01.000Z",
"cve": "CVE-2025-39824",
"id": "msrc_CVE-2025-39824",
"initial_release_date": "2025-09-02T00:00:00.000Z",
"product_status:fixed": "2",
"product_status:known_affected": "2",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "HID: asus: fix UAF via HID_CLAIMED_INPUT validation",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-39824.json",
"version": "4"
},
"nvd": {
"cve": {
"affected": [
{
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{
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"programFiles": [
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{
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"defaultStatus": "unknown",
"product": "SIMATIC CN 4100",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
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]
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],
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: asus: fix UAF via HID_CLAIMED_INPUT validation\n\nAfter hid_hw_start() is called hidinput_connect() will eventually be\ncalled to set up the device with the input layer since the\nHID_CONNECT_DEFAULT connect mask is used. During hidinput_connect()\nall input and output reports are processed and corresponding hid_inputs\nare allocated and configured via hidinput_configure_usages(). This\nprocess involves slot tagging report fields and configuring usages\nby setting relevant bits in the capability bitmaps. However it is possible\nthat the capability bitmaps are not set at all leading to the subsequent\nhidinput_has_been_populated() check to fail leading to the freeing of the\nhid_input and the underlying input device.\n\nThis becomes problematic because a malicious HID device like a\nASUS ROG N-Key keyboard can trigger the above scenario via a\nspecially crafted descriptor which then leads to a user-after-free\nwhen the name of the freed input device is written to later on after\nhid_hw_start(). Below, report 93 intentionally utilises the\nHID_UP_UNDEFINED Usage Page which is skipped during usage\nconfiguration, leading to the frees.\n\n0x05, 0x0D, // Usage Page (Digitizer)\n0x09, 0x05, // Usage (Touch Pad)\n0xA1, 0x01, // Collection (Application)\n0x85, 0x0D, // Report ID (13)\n0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)\n0x09, 0xC5, // Usage (0xC5)\n0x15, 0x00, // Logical Minimum (0)\n0x26, 0xFF, 0x00, // Logical Maximum (255)\n0x75, 0x08, // Report Size (8)\n0x95, 0x04, // Report Count (4)\n0xB1, 0x02, // Feature (Data,Var,Abs)\n0x85, 0x5D, // Report ID (93)\n0x06, 0x00, 0x00, // Usage Page (Undefined)\n0x09, 0x01, // Usage (0x01)\n0x15, 0x00, // Logical Minimum (0)\n0x26, 0xFF, 0x00, // Logical Maximum (255)\n0x75, 0x08, // Report Size (8)\n0x95, 0x1B, // Report Count (27)\n0x81, 0x02, // Input (Data,Var,Abs)\n0xC0, // End Collection\n\nBelow is the KASAN splat after triggering the UAF:\n\n[ 21.672709] ==================================================================\n[ 21.673700] BUG: KASAN: slab-use-after-free in asus_probe+0xeeb/0xf80\n[ 21.673700] Write of size 8 at addr ffff88810a0ac000 by task kworker/1:2/54\n[ 21.673700]\n[ 21.673700] CPU: 1 UID: 0 PID: 54 Comm: kworker/1:2 Not tainted 6.16.0-rc4-g9773391cf4dd-dirty #36 PREEMPT(voluntary)\n[ 21.673700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014\n[ 21.673700] Call Trace:\n[ 21.673700] \u003cTASK\u003e\n[ 21.673700] dump_stack_lvl+0x5f/0x80\n[ 21.673700] print_report+0xd1/0x660\n[ 21.673700] kasan_report+0xe5/0x120\n[ 21.673700] __asan_report_store8_noabort+0x1b/0x30\n[ 21.673700] asus_probe+0xeeb/0xf80\n[ 21.673700] hid_device_probe+0x2ee/0x700\n[ 21.673700] really_probe+0x1c6/0x6b0\n[ 21.673700] __driver_probe_device+0x24f/0x310\n[ 21.673700] driver_probe_device+0x4e/0x220\n[...]\n[ 21.673700]\n[ 21.673700] Allocated by task 54:\n[ 21.673700] kasan_save_stack+0x3d/0x60\n[ 21.673700] kasan_save_track+0x18/0x40\n[ 21.673700] kasan_save_alloc_info+0x3b/0x50\n[ 21.673700] __kasan_kmalloc+0x9c/0xa0\n[ 21.673700] __kmalloc_cache_noprof+0x139/0x340\n[ 21.673700] input_allocate_device+0x44/0x370\n[ 21.673700] hidinput_connect+0xcb6/0x2630\n[ 21.673700] hid_connect+0xf74/0x1d60\n[ 21.673700] hid_hw_start+0x8c/0x110\n[ 21.673700] asus_probe+0x5a3/0xf80\n[ 21.673700] hid_device_probe+0x2ee/0x700\n[ 21.673700] really_probe+0x1c6/0x6b0\n[ 21.673700] __driver_probe_device+0x24f/0x310\n[ 21.673700] driver_probe_device+0x4e/0x220\n[...]\n[ 21.673700]\n[ 21.673700] Freed by task 54:\n[ 21.673700] kasan_save_stack+0x3d/0x60\n[ 21.673700] kasan_save_track+0x18/0x40\n[ 21.673700] kasan_save_free_info+0x3f/0x60\n[ 21.673700] __kasan_slab_free+0x3c/0x50\n[ 21.673700] kfre\n---truncated---"
}
],
"id": "CVE-2025-39824",
"lastModified": "2026-06-17T09:18:33.630",
"metrics": {
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{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
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"value": "CWE-416"
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"current_release_date": "2026-06-30T01:20:55+00:00",
"cve": "CVE-2025-39824",
"id": "CVE-2025-39824",
"initial_release_date": "2025-09-16T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Linux kernel (ASUS HID): Use-after-free vulnerability allows arbitrary code execution or denial of service",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39824.json",
"version": "3"
},
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"current_release_date": "2026-09-11T01:58:22Z",
"cve": "CVE-2025-39824",
"id": "CVE-2025-39824",
"initial_release_date": "2025-09-16T23:23:52Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "517",
"product_status:known_not_affected": "36",
"product_status:recommended": "693",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-39824",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39824.json",
"version": "62"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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