From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C25223655CE for ; Sun, 18 Oct 2026 15:23:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792337002; cv=none; b=HPl5wwZRDP0gfEE4t0omFfvvtTqOPIBWTvojHsVnv9sm//5OSidFHJ74nPMI0VtBi05EXsYPqHTERPhq+xppy0kDxf0HhtFSJovkjnTMb9uu327SFqvdoNsgX95UPd0ADcRzV0JTBnzZjZ2ivwbURM3tvUp6fOuI6ZLt/2tYE2Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792337002; c=relaxed/simple; bh=JXfN7kU29SSvec0aBj7D736IJ7eZbKfk+ElMfFEhX24=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=S3RgtaFvSqfP3En6EGOa39YH58+pVy4QMdrnGEsJywD6MRKnSZQn0DmZ7O/L8wdlGyOnNkpEZroldlUwjqP+CTENSJ1pEyPqMdOphNmteOmjtRJJMNdwisI13TPgPEiHggb+gLnhC/HOygqnulF8LwES0YrLIS86NlHppRBVk1I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uz3Mv/nA; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uz3Mv/nA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D72111F000C4; Sun, 18 Oct 2026 15:23:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792337001; bh=GNXdCLxgiIFgcp0Lo0pDzK2F7ad8kFkbgp4a5MX6ug8=; h=From:To:Cc:Subject:Date:Reply-To; b=uz3Mv/nAy7jjHkFbuqlSRt+rPM74XyyeFM7xxWLUOh2H4ZHqGqfeXki0m1lkLraXx rGdrTt3ddGeoC1SSSa5A+y6z+tntImN71wpkT9XYLkE2LRdq25WPkvg6u2sv/40R+Q Pj57gT2fAOIGcZWX3H04Y2VAUA8h+jsfYsy69/qU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98499: HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce() Date: Sun, 18 Oct 2026 17:16:03 +0200 Message-ID: <2026101818-CVE-2026-98499-e1a5@gregkh> X-Mailer: git-send-email 2.56.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4345; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ppYatAacxNFUmWalLhR3tk5pN3gIYcTOqtUUXIpKkYA=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXHrXN22GQ8WOraebWH2xe09K2fbMMvsSqF1ehKbXy1 p2rztu3dcSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBETBczzBV413Xmc+9mDzbr 9yp3j0xnexe2eSHDgmk7BefvCHYLuftmzd5HQVIrlA692AoA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman 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. The Linux kernel CVE team has assigned CVE-2026-98499 to this issue. Affected and fixed versions =========================== Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 5.10.271 with commit 9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51 Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 5.15.222 with commit 26471d954bbfbfb9032994f7f485802ee20e0582 Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 6.1.189 with commit 456afe4707e23cc114ad833197f63b52bb8fd1e7 Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 6.6.158 with commit 65e7c4b5366b770c60dfefac3f1d06e33a9e411e Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 6.12.112 with commit eaa7d29341ef4b91e84ad097562982288a7c376c Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 6.18.55 with commit c3129e6f26e18c0886ede7265f187a7ec289e1d1 Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 7.2.9 with commit 4b09b7c84b8633cd041181616bd15bf5e73c164d Issue introduced in 4.16 with commit 83417206427bdf0fef9fa69957807194f25923c3 and fixed in 7.3-rc5 with commit 9aa237cf66495b2426ddde8532e9b08a0ed83aaa Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-98499 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/hid/wacom_sys.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51 https://git.kernel.org/stable/c/26471d954bbfbfb9032994f7f485802ee20e0582 https://git.kernel.org/stable/c/456afe4707e23cc114ad833197f63b52bb8fd1e7 https://git.kernel.org/stable/c/65e7c4b5366b770c60dfefac3f1d06e33a9e411e https://git.kernel.org/stable/c/eaa7d29341ef4b91e84ad097562982288a7c376c https://git.kernel.org/stable/c/c3129e6f26e18c0886ede7265f187a7ec289e1d1 https://git.kernel.org/stable/c/4b09b7c84b8633cd041181616bd15bf5e73c164d https://git.kernel.org/stable/c/9aa237cf66495b2426ddde8532e9b08a0ed83aaa