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CVE-2026-68091— HID: wacom: stop hardware after post-start probe failures

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于wacom_parse_and_register()函数在注册输入和初始化pad LED/remotes之前启动HID硬件，后续步骤失败时错误路径未停止HID硬件就释放Wacom资源，可能导致硬件资源未正确释放。

CVSS 8.8 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux f304eb483393f135ab479d02da6f5dc7d9b51cd6< 5a7ca028facf04921b2c1c2e4d1ee7f282510555 affected
853307924a9003b3142b5253b1caa6625fbad9fc< 3e6473a4f0596182acdda5219b4bebfbee76514f affected
e5c6c8ef3e4d3a88407404daafbf2c6be62f2185< 46d8b8c85ae0589fb85746a64e8908160e52aac3 affected
fc41101a94b11cd0d5ad8e213b2b6965f248d653< 1a1ebdcb56ae58a0ee2c54dd15d75121e30424e3 affected
c1d6708bf0d3dd976460d435373cf5abf21ce258< 75eb2173b63ab41c24d80cd641af18f3c117a267 affected
c1d6708bf0d3dd976460d435373cf5abf21ce258< 416095e9a6037b4b39fcadd0d2bd77a8852211ec affected
c1d6708bf0d3dd976460d435373cf5abf21ce258< e2cc711a9df37f359159b21db56cea9c21f58a9c affected
c1d6708bf0d3dd976460d435373cf5abf21ce258< ec2612b8ad9e642596db011dd8b6568ef1edeaa1 affected
… +20 more rows
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I. Basic Information for CVE-2026-68091

Vulnerability Information
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Vulnerability Title
HID: wacom: stop hardware after post-start probe failures
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: wacom: stop hardware after post-start probe failures wacom_parse_and_register() starts HID hardware before registering inputs and initializing pad LEDs/remotes. Those later steps can fail, but their error paths currently release Wacom resources without stopping the HID hardware. Route post-hid_hw_start() failures through hid_hw_stop() before releasing driver resources. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于wacom_parse_and_register()函数在注册输入和初始化pad LED/remotes之前启动HID硬件，后续步骤失败时错误路径未停止HID硬件就释放Wacom资源，可能导致硬件资源未正确释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f304eb483393f135ab479d02da6f5dc7d9b51cd6 ~ 5a7ca028facf04921b2c1c2e4d1ee7f282510555 -
Linux Linux 6.8 -

II. Public POCs for CVE-2026-68091

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III. Intelligence Information for CVE-2026-68091

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Patches & Fixes for CVE-2026-68091 (6)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68091

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