In the Linux kernel, the following vulnerability has been resolved:
HID: multitouch: fix slab out-of-bounds access in mt_report_fixup()
A malicious HID device can trigger a slab out-of-bounds during
mt_report_fixup() by passing in report descriptor smaller than
607 bytes. mt_report_fixup() attempts to patch byte offset 607
of the descriptor with 0x25 by first checking if byte offset
607 is 0x15 however it lacks bounds checks to verify if the
descriptor is big enough before conducting this check. Fix
this bug by ensuring the descriptor size is at least 608
bytes before accessing it.
Below is the KASAN splat after the out of bounds access happens:
[ 13.671954] ==================================================================
[ 13.672667] BUG: KASAN: slab-out-of-bounds in mt_report_fixup+0x103/0x110
[ 13.673297] Read of size 1 at addr ffff888103df39df by task kworker/0:1/10
[ 13.673297]
[ 13.673297] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.15.0-00005-gec5d573d83f4-dirty #3
[ 13.673297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/04
[ 13.673297] Call Trace:
[ 13.673297] <TASK>
[ 13.673297] dump_stack_lvl+0x5f/0x80
[ 13.673297] print_report+0xd1/0x660
[ 13.673297] kasan_report+0xe5/0x120
[ 13.673297] __asan_report_load1_noabort+0x18/0x20
[ 13.673297] mt_report_fixup+0x103/0x110
[ 13.673297] hid_open_report+0x1ef/0x810
[ 13.673297] mt_probe+0x422/0x960
[ 13.673297] hid_device_probe+0x2e2/0x6f0
[ 13.673297] really_probe+0x1c6/0x6b0
[ 13.673297] __driver_probe_device+0x24f/0x310
[ 13.673297] driver_probe_device+0x4e/0x220
[ 13.673297] __device_attach_driver+0x169/0x320
[ 13.673297] bus_for_each_drv+0x11d/0x1b0
[ 13.673297] __device_attach+0x1b8/0x3e0
[ 13.673297] device_initial_probe+0x12/0x20
[ 13.673297] bus_probe_device+0x13d/0x180
[ 13.673297] device_add+0xe3a/0x1670
[ 13.673297] hid_add_device+0x31d/0xa40
[...]
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
|
History
16 Jan 2026, 20:07
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| References | () https://git.kernel.org/stable/c/0379eb8691b9c4477da0277ae0832036ca4410b4 - Patch | |
| References | () https://git.kernel.org/stable/c/3055309821dd3da92888f88bad10f0324c3c89fe - Patch | |
| References | () https://git.kernel.org/stable/c/4263e5851779f7d8ebfbc9cc7d2e9b0217adba8d - Patch | |
| References | () https://git.kernel.org/stable/c/7ab7311c43ae19c66c53ccd8c5052a9072a4e338 - Patch | |
| References | () https://git.kernel.org/stable/c/c13e95587583d018cfbcc277df7e02d41902ac5a - Patch | |
| References | () https://git.kernel.org/stable/c/d4e6e2680807671e1c73cd6a986b33659ce92f2b - Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory | |
| First Time |
Linux
Debian Debian debian Linux Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:* |
|
| CWE | CWE-125 |
03 Nov 2025, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
16 Sep 2025, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-16 13:15
Updated : 2026-01-16 20:07
NVD link : CVE-2025-39806
Mitre link : CVE-2025-39806
CVE.ORG link : CVE-2025-39806
JSON object : View
Products Affected
debian
- debian_linux
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read