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CVE-2026-63916— HID: wacom: Fix OOB write in wacom_hid_set_device_mode()

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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于wacom_hid_set_device_mode()函数中未正确处理HID_DG_INPUTMODE所在字段位置，可能导致越界写入。

CVSS 8.8 · High EPSS 0.41% · P34

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5ae6e89f7409cb5d218bb728326eba9c650d9700< 2add311d99646c9d235b2c44f9c169ba30f5db3a affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< 83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< 5716a293fb19d382ca2336e08fd28a619a5f3c25 affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< ed598de9f61582902406d352d99f2073d8e00298 affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< 43e7c02d6090a82fd60d63491f6871aec906345e affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< b8338111e14183972359009c12d0dbd81d2e1e16 affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< 5db3fca0cec7b33bc5379411d0a60d792c9f9bc0 affected
5ae6e89f7409cb5d218bb728326eba9c650d9700< c0a8899e02ddebd51e2589835182c239c2e224ae affected
… +10 more rows
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I. Basic Information for CVE-2026-63916

Vulnerability Information
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Vulnerability Title
HID: wacom: Fix OOB write in wacom_hid_set_device_mode()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: wacom: Fix OOB write in wacom_hid_set_device_mode() wacom_hid_set_device_mode() currently assumes that the HID_DG_INPUTMODE usage is always located in the first field (field[0]) of the feature report. However, a device can specify HID_DG_INPUTMODE in a different field. If HID_DG_INPUTMODE is in a field other than the first one and the first field has a report_count smaller than the usage_index of HID_DG_INPUTMODE, this leads to an out-of-bounds write to r->field[0]->value. Fix this by storing the field index of HID_DG_INPUTMODE in 'struct hid_data' during feature mapping. In wacom_hid_set_device_mode(), use this stored field index to access the correct field and add bounds checks to ensure both the field index and the value index are within valid ranges before writing.
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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于wacom_hid_set_device_mode()函数中未正确处理HID_DG_INPUTMODE所在字段位置，可能导致越界写入。
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 5ae6e89f7409cb5d218bb728326eba9c650d9700 ~ 2add311d99646c9d235b2c44f9c169ba30f5db3a -
Linux Linux 3.18 -

II. Public POCs for CVE-2026-63916

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III. Intelligence Information for CVE-2026-63916

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Patches & Fixes for CVE-2026-63916 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64091 9.8 CRITICAL batman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-64037 9.8 CRITICAL wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-63888 9.8 CRITICAL scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
CVE-2026-63887 9.8 CRITICAL scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-64089 9.8 CRITICAL batman-adv: tt: fix negative last_changeset_len
CVE-2026-64122 9.8 CRITICAL net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-64016 9.8 CRITICAL ksmbd: fix durable reconnect error path file lifetime
CVE-2026-64102 9.8 CRITICAL RDMA/siw: Reject MPA FPDU length underflow before signed receive math
CVE-2026-64160 9.8 CRITICAL netfs: Fix potential for tearing in ->remote_i_size and ->zero_point
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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