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 2B0A63BAD9F for ; Tue, 6 Oct 2026 08:47:30 +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=1791276452; cv=none; b=Mz+GQW5BtL1qYq1EOhPvpnkIi/cVzozeiiWbWJu9EiywSTte50Kim6jRDzbvncdH30SQ5u5Y2aGiRJroC4GMwH0vywV3qWdbxJlJFjcS9RhidUzg53QTLIh36yS8TcUfKH4bFqOXKazdnocdwG49pz7EmtbJhs6LLS/U92mWj28= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791276452; c=relaxed/simple; bh=Vs4O2+jdhkqu3KPmTsTALffjgNaqeLUJtJIL0t+8x/k=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IdyWM4if6r1TLrK5Lwz5AMp7n/HN8PfURUQMCeSJUKsb5uas7T43/J/3dS3j/nyw5m/vDNxpxF5EuP62DisTx0o2gMkTxJGCYTKcGxhtImdf5zJJ6VAGZbN5TJXbP2BRQFTFXRRnHyCxfJtrDzFfVz303MhybqNxy81GLwkGme8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WCjknqT5; 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="WCjknqT5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 507AB1F00893; Tue, 6 Oct 2026 08:47:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791276450; bh=B80W+IEMrlFIqtLxRrWXbv0025rUlCFujtQa1q9cBus=; h=From:To:Cc:Subject:Date:Reply-To; b=WCjknqT5/ihKXtdmcUAsTqGY7jDUscO5xtnEvwFPcqHqGmPL4CHymNsFWYiX62rKj RB32XCwT0K532idLXnqQ2tiSL0VvurAxOt4RwuwLIWYY4qUYPkoS18ffRIMO7MB+f+ UzQZHVGiITIFgT1UycY4dJevjd5UiPfsMhJYf07Q= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98205: Input: evdev - zero absinfo before partial copy in EVIOCSABS Date: Tue, 6 Oct 2026 10:45:06 +0200 Message-ID: <2026100637-CVE-2026-98205-e2ea@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=4057; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=e0OJIXXFT+tuZFa1jJKA4JWE9wLcbSBUBoyWIjnkYMw=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlHtnwt2204f8G0eRma+43VeY9N3HKrVEnq/eYfUe3qU U8U7K6e7IhlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJiLEwLDjDunWbOusryS7x g2pH08rOuWcZ8TMsOPrN8ErgnvBJnBfTdi5e07KhPk23EAA= 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: Input: evdev - zero absinfo before partial copy in EVIOCSABS The EVIOCSABS handler copies at most the user supplied ioctl size into an uninitialized on-stack struct input_absinfo: if (copy_from_user(&abs, p, min_t(size_t, size, sizeof(struct input_absinfo)))) The size comes from _IOC_SIZE() of the ioctl command and is therefore fully controlled by userspace. A short size leaves the trailing part of the structure holding whatever was on the kernel stack, and the whole structure is then stored into the device: dev->absinfo[t] = abs; EVIOCGABS hands that back to userspace, disclosing the stale stack bytes. Only the resolution field is currently cleared, which covers the legacy struct layout but not an arbitrarily short size. Zero the structure before the copy so any part not supplied by the caller reads back as zero. The existing resolution fixup is kept, since it also handles a size that partially overlaps that field. The Linux kernel CVE team has assigned CVE-2026-98205 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 5.10.271 with commit c0aebb57b73c7d06ad21731099afe119b113c403 Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 5.15.222 with commit 89b6ffa4bc10c436fa9aecc73be105124cd58a35 Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 6.1.189 with commit e834e134a32b6a5c600fa539bb49146f617743ab Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 6.6.158 with commit af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 6.12.112 with commit 30b853a3d71f16bd0aa66b604bc37dd1254a19b3 Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 6.18.54 with commit 71e5619db11dd6429101bd967230d0321ec5ea26 Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 7.2.8 with commit 3dfe48d5307a1ba22c58231d04257737015569ca Issue introduced in 2.6.36 with commit 448cd1664a573e69f54bfd32f3bb7220212b6cf5 and fixed in 7.3-rc4 with commit 8b852965b8eaf910c314dc346967ed82c8d4f235 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-2026-98205 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/input/evdev.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/c0aebb57b73c7d06ad21731099afe119b113c403 https://git.kernel.org/stable/c/89b6ffa4bc10c436fa9aecc73be105124cd58a35 https://git.kernel.org/stable/c/e834e134a32b6a5c600fa539bb49146f617743ab https://git.kernel.org/stable/c/af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b https://git.kernel.org/stable/c/30b853a3d71f16bd0aa66b604bc37dd1254a19b3 https://git.kernel.org/stable/c/71e5619db11dd6429101bd967230d0321ec5ea26 https://git.kernel.org/stable/c/3dfe48d5307a1ba22c58231d04257737015569ca https://git.kernel.org/stable/c/8b852965b8eaf910c314dc346967ed82c8d4f235