High Memory corruption

CVE-2025-39824 — HID: asus: fix UAF via HID_CLAIMED_INPUT validation

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---

Published Sep 16, 2025 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Debian

Debian Linux and 2 more

CVSS base

7.8

High · 1 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Linux Linux, Linux Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Debian	Debian Linux	version 11.0	Vulnerable	NIST National Vulnerability Database
Linux	Linux	version 4.10≥ 9ce12d8be12c94334634dd57050444910415e45f and < d3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4≥ 9ce12d8be12c94334634dd57050444910415e45f and < 72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275≥ 9ce12d8be12c94334634dd57050444910415e45f and < c0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c≥ 9ce12d8be12c94334634dd57050444910415e45f and < 5f3c0839b173f7f33415eb098331879e547d1d2d≥ 9ce12d8be12c94334634dd57050444910415e45f and < a8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c≥ 9ce12d8be12c94334634dd57050444910415e45f and < eaae728e7335b5dbad70966e2bd520a731fdf7b2≥ 9ce12d8be12c94334634dd57050444910415e45f and < 7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5 and 1 more ≥ 9ce12d8be12c94334634dd57050444910415e45f and < 9a9e4a8317437bf944fa017c66e1e23a0368b5c7	Vulnerable	CVE Program (cve.org) e CISA ADP
Linux	Linux Kernel	version 6.17-rc3version 6.17-rc2version 6.17-rc1≥ 6.13 and < 6.16.5≥ 6.7 and < 6.12.45≥ 6.2 and < 6.6.104≥ 5.16 and < 6.1.150≥ 5.11 and < 5.15.191 and 2 more ≥ 5.5 and < 5.10.242≥ 4.10 and < 5.4.298	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.8	CVSS 3.1	High	1.8	5.9	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-416 · Use After Free

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 19, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 19, 2026
Fix documented
Oct 19, 2026 · NIST National Vulnerability Database
CVSS changed · 7.8
Oct 19, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 19, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 19, 2026 · NIST National Vulnerability Database
2025
CVE published
Sep 16, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 19, 2026 – Oct 19, 2026

References

11 on the record

git.kernel.org/stable/c/eaae728e7335b5dbad70966e2bd520a731fdf7b2
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/d3af6ca9a8c34bbd8cff32b469b84c9021c9e7e4
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/72a4ec018c9e9bc52f4f80eb3afb5d6a6b752275
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/c0d77e3441a92d0b4958193c9ac1c3f81c6f1d1c
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/7170122e2ae4ab378c9cdf7cc54dea8b0abbbca5
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/5f3c0839b173f7f33415eb098331879e547d1d2d
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/9a9e4a8317437bf944fa017c66e1e23a0368b5c7
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/a8ca8fe7f516d27ece3afb995c3bd4d07dcbe62c
Patch, NIST National Vulnerability Database
cert-portal.siemens.com/productcert/html/ssa-032379.html
NIST National Vulnerability Database
lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Mailing List, Third Party Advisory, NIST National Vulnerability Database
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Mailing List, Third Party Advisory, NIST National Vulnerability Database

Elsewhere on this site

Debian
every CVE for this vendor

Memory corruption
same class

CWE-416
other pages naming this weakness

Related CVEs (same products)

Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 1d
Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 1d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 1d
Unknown CVE-2026-98865 sched_ext: Don't run ops.dequeue() with a DSQ lock held 1d
Unknown CVE-2026-98864 sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing a task 1d
Unknown CVE-2026-98863 KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No CISA SSVC assessment.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-39824 is "HID: asus: fix UAF via HID_CLAIMED_INPUT validation", rated High. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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