n 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 [...]
Configuration 1 (hide)
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Configuration 2 (hide)
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16 Jan 2026, 20:07
| Type | Values Removed | Values Added |
|---|---|---|
| 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 |
Debian
Linux linux Kernel Linux Debian debian Linux |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CWE | CWE-125 | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* |
03 Nov 2025, 18:16
| Type | Values Removed | Values Added |
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| References |
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18 Sep 2025, 13:43
| Type | Values Removed | Values Added |
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| New CVE |
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
Out-of-bounds Read