CVE-2025-39824
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-39824
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39824.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-39824
- Downstream
- Published
- 2025-09-16T13:00:23Z
- Modified
- 2025-10-10T19:30:33.370575Z
- Summary
- HID: asus: fix UAF via HID_CLAIMED_INPUT validation
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
HID: asus: fix UAF via HIDCLAIMEDINPUT validation
After hidhwstart() is called hidinputconnect() will eventually be called to set up the device with the input layer since the HIDCONNECTDEFAULT connect mask is used. During hidinputconnect() all input and output reports are processed and corresponding hidinputs are allocated and configured via hidinputconfigureusages(). 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 hidinputhasbeenpopulated() 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 hidhwstart(). Below, report 93 intentionally utilises the HIDUPUNDEFINED 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 asusprobe+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] dumpstacklvl+0x5f/0x80 [ 21.673700] printreport+0xd1/0x660 [ 21.673700] kasanreport+0xe5/0x120 [ 21.673700] _asanreportstore8noabort+0x1b/0x30 [ 21.673700] asusprobe+0xeeb/0xf80 [ 21.673700] hiddeviceprobe+0x2ee/0x700 [ 21.673700] reallyprobe+0x1c6/0x6b0 [ 21.673700] _driverprobedevice+0x24f/0x310 [ 21.673700] driverprobedevice+0x4e/0x220 [...] [ 21.673700] [ 21.673700] Allocated by task 54: [ 21.673700] kasansavestack+0x3d/0x60 [ 21.673700] kasansavetrack+0x18/0x40 [ 21.673700] kasansaveallocinfo+0x3b/0x50 [ 21.673700] _kasankmalloc+0x9c/0xa0 [ 21.673700] _kmalloccachenoprof+0x139/0x340 [ 21.673700] inputallocatedevice+0x44/0x370 [ 21.673700] hidinputconnect+0xcb6/0x2630 [ 21.673700] hidconnect+0xf74/0x1d60 [ 21.673700] hidhwstart+0x8c/0x110 [ 21.673700] asusprobe+0x5a3/0xf80 [ 21.673700] hiddeviceprobe+0x2ee/0x700 [ 21.673700] reallyprobe+0x1c6/0x6b0 [ 21.673700] _driverprobedevice+0x24f/0x310 [ 21.673700] driverprobedevice+0x4e/0x220 [...] [ 21.673700] [ 21.673700] Freed by task 54: [ 21.673700] kasansavestack+0x3d/0x60 [ 21.673700] kasansavetrack+0x18/0x40 [ 21.673700] kasansavefreeinfo+0x3f/0x60 [ 21.673700] _kasanslab_free+0x3c/0x50 [ 21.673700] kfre ---truncated---
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/5f3c0839b173f7f33415eb098331879e547d1d2d
- https://git.kernel.org/stable/c/7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5
- https://git.kernel.org/stable/c/72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275
- https://git.kernel.org/stable/c/9a9e4a8317437bf944fa017c66e1e23a0368b5c7
- https://git.kernel.org/stable/c/a8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c
- https://git.kernel.org/stable/c/c0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c
- https://git.kernel.org/stable/c/d3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4
- https://git.kernel.org/stable/c/eaae728e7335b5dbad70966e2bd520a731fdf7b2
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixed9a9e4a8317437bf944fa017c66e1e23a0368b5c7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixed7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixedeaae728e7335b5dbad70966e2bd520a731fdf7b2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixeda8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixed5f3c0839b173f7f33415eb098331879e547d1d2d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixedc0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixed72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced9ce12d8be12c94334634dd57050444910415e45fFixedd3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4
Affected versions
v4.*
v5.*
v6.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced4.10.0Fixed5.4.298
- Type
- ECOSYSTEM
- Events
-
Introduced5.5.0Fixed5.10.242
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.191
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.150
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.104
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.45
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.16.5