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CVE-2026-98499— HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()

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.

在 Linux 内核中，以下漏洞已得到修复： HID: wacom：修复 中的越界读取问题 函数可能计算并传递一个无效的偏移量给 ，导致在内核中读取错误的内存地址——甚至可能超出 HID 报告的实际末尾。如果 HID 描述符中声明的用法数量（usages）超过了其 Report Count 实际预留的空间，则该函数内部循环中的变量 会越过字段的末尾： 例如，若某个描述符声明了 12288 个用法，但 Report Count 仅为 1，该循环将尝试从位偏移 98296（即 2 字节的接收报告之后约 12 KB 的位

CVSS 8.1 · High EPSS 0.39% · P33

Possible ATT&CK Techniques 1 AI

T1552 · Unsecured Credentials

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 83417206427bdf0fef9fa69957807194f25923c3< 9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51 affected
83417206427bdf0fef9fa69957807194f25923c3< 26471d954bbfbfb9032994f7f485802ee20e0582 affected
83417206427bdf0fef9fa69957807194f25923c3< 456afe4707e23cc114ad833197f63b52bb8fd1e7 affected
83417206427bdf0fef9fa69957807194f25923c3< 65e7c4b5366b770c60dfefac3f1d06e33a9e411e affected
83417206427bdf0fef9fa69957807194f25923c3< eaa7d29341ef4b91e84ad097562982288a7c376c affected
83417206427bdf0fef9fa69957807194f25923c3< c3129e6f26e18c0886ede7265f187a7ec289e1d1 affected
83417206427bdf0fef9fa69957807194f25923c3< 4b09b7c84b8633cd041181616bd15bf5e73c164d affected
83417206427bdf0fef9fa69957807194f25923c3< 9aa237cf66495b2426ddde8532e9b08a0ed83aaa affected
… +10 more rows
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I. Basic Information for CVE-2026-98499

Vulnerability Information
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Vulnerability Title
HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce() The 'wacom_wac_pen_serial_enforce()' function may calculate and pass an invalid offset to hid_field_extract(), resulting in memory reads at incorrect addresses -- possibly beyond the end of the report. If a field in the HID descriptor lists more usages than its Report Count actually reserves space for, the function's inner 'j' will walk past the end of the field: for (i = 0; i < report->maxfield; i++) { for (j = 0; j < report->field[i]->maxusage; j++) { ... value = hid_field_extract(hdev, raw_data + 1, offset + j * size, size); A descriptor listing 12288 usages against Report Count 1 has the loop extract the usage at index 12287 from bit offset 98296 -- about 12 KB past a 2-byte received report. The value is stored in wacom_wac->serial[0] and can reach userspace as an MSC_SERIAL event, making this an information disclosure. Clamp the loop to field->report_count, the number of value slots the report holds. Value slots past the last declared usage are still scanned; they reuse that usage (HID 1.11, 6.2.2.8). Verified on v6.12.105 with a UHID reproducer: a 2-byte report from such a descriptor trips KASAN before the patch and not after it.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 83417206427bdf0fef9fa69957807194f25923c3 ~ 9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51 -
Linux Linux 4.16 -

II. Public POCs for CVE-2026-98499

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III. Intelligence Information for CVE-2026-98499

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Patches & Fixes for CVE-2026-98499 (8)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98548 9.8 CRITICAL sctp: discard the rest of the packet on a stale-cookie error
CVE-2026-98490 9.8 CRITICAL net: openvswitch: conntrack: fix helper UAF due to extensions realloc
CVE-2026-98464 9.3 CRITICAL RISC-V: KVM: Synchronize hrtimer callback during teardown
CVE-2026-98549 9.1 CRITICAL tcp: prevent collapsing skbs across boundary in rtx queue
CVE-2026-98451 8.8 HIGH smb: client: use finish_no_open() for non-regular inodes
CVE-2026-98466 8.2 HIGH KVM: arm64: Transfer the hyp stack pages out of the host stage-2
CVE-2026-98532 8.1 HIGH ipv6: do not let ipv6_find_hdr() return an offset past the packet end
CVE-2026-98454 8.1 HIGH smb: client: fix create context out-of-bounds reads
CVE-2026-98442 7.8 HIGH net/sched: act_ct: fix helper UAF due to extensions realloc
CVE-2026-98436 7.8 HIGH accel/amdxdna: Disable device buffer exporting
CVE-2026-98510 7.8 HIGH drm/xe/vm: nuke PTs only after unlinking contested VMAs
CVE-2026-98524 7.8 HIGH rds: ib: Clear the sg list when mapping an MR fails
CVE-2026-98441 7.8 HIGH net/sched: act_ct: avoid modifying shared unconfirmed ct entry
CVE-2026-98515 7.8 HIGH drm/nouveau: fix double-free in nvif_vmm_dtor
CVE-2026-98520 7.8 HIGH drm/amdkfd: fix use-after-free and multi-container gap in kfd_dev_mapping
CVE-2026-98487 7.8 HIGH net: bridge: mdb: restart port group walk after deletion
CVE-2026-98507 7.8 HIGH mm/rmap: fix missing barrier between anon_vma init and vma->anon_vma publish
CVE-2026-98443 7.8 HIGH xfs: fix cursor and pointer handling when recovering iunlink buckets
CVE-2026-98517 7.8 HIGH drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM
CVE-2026-98491 7.8 HIGH net: openvswitch: conntrack: avoid modifying shared unconfirmed ct entry

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux