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CVE-2026-98499

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <4.16, <65e7c4b5366b770c60dfefac3f1d06e33a9e411e, 6.18.55, <c3129e6f26e18c0886ede7265f187a7ec289e1d1, 0, 83417206427bdf0fef9fa69957807194f25923c3, 6.12.112, 5.10.271, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <26471d954bbfbfb9032994f7f485802ee20e0582, <=6.18.*, 5.15.222, <4b09b7c84b8633cd041181616bd15bf5e73c164d, <=7.2.*, 4.16, <9aa237cf66495b2426ddde8532e9b08a0ed83aaa, 7.2.9, <eaa7d29341ef4b91e84ad097562982288a7c376c, <=*, <9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51, <=5.15.*, <456afe4707e23cc114ad833197f63b52bb8fd1e7, 7.3

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.

Gravité et risque d'exploitation

CVE-2026-98499 obtient un score CVSS de 0.0/10, soit une gravité non évaluée.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <4.16, <65e7c4b5366b770c60dfefac3f1d06e33a9e411e, 6.18.55, <c3129e6f26e18c0886ede7265f187a7ec289e1d1, 0, 83417206427bdf0fef9fa69957807194f25923c3, 6.12.112, 5.10.271, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <26471d954bbfbfb9032994f7f485802ee20e0582, <=6.18.*, 5.15.222, <4b09b7c84b8633cd041181616bd15bf5e73c164d, <=7.2.*, 4.16, <9aa237cf66495b2426ddde8532e9b08a0ed83aaa, 7.2.9, <eaa7d29341ef4b91e84ad097562982288a7c376c, <=*, <9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51, <=5.15.*, <456afe4707e23cc114ad833197f63b52bb8fd1e7, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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