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 17DD1381EBB for ; Thu, 17 Sep 2026 16:34:42 +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=1789662883; cv=none; b=Ujx7Xg6VO8VoUYgy4Xuw5byGqzU98cBLvLhQVlYWhlRifwbeCoC7uL2/wI7Nv/xNMCVWtMCYKFsFOIaO3rJxWVMiHDvB22Tgw30XHfcj1Rt+CaAANS6wuEebWumz+3FXXoQxFzKdqA5Egi82E5Kz8t6pwocIBae+vnlBDHC4yFs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789662883; c=relaxed/simple; bh=L1WqlLFXVQLfmv1oIIvzt1w/TqKPGIRQSBn3f3REyX8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=amu1xGpqDjWs/SaPlIC9iqq2WuLmNWkch3u9JZxR51OnDaxRYXHoJWmZNN8nSseVqiL55kuHWRDU0rh4LAu1ru96i4nm1JGsr1yXRLOheI2Agjhsy1EJs8/RdrGPG+Tfwrc/CKX2sGfrBKr5DjHHeXB8TubbDdYM5T8OfFmcYtA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=q0x1TFyD; 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="q0x1TFyD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 700D81F000FF; Thu, 17 Sep 2026 16:34:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789662882; bh=rZWa5UHT+g4ESegd5rWmsFOecesDgpYqPjQ1IdoW9MI=; h=From:To:Cc:Subject:Date:Reply-To; b=q0x1TFyDTBRYyl76MQ4Umo34cAnLLmncL2sNIsCpvHe6H6iJRMV07nJctldeUt69i CKSHvXOjRfwB5kIqPqRpnm2CQXLVnrLQ5hyfjrb3yMG/D8TzCIW+a8RKgMSKw/Fp9E fBYUd6gXrR2qsk2H8bVUqAI+Ys4s9fdWQSaUzUik= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-93053: speakup: keyhelp: guard letter_offsets possible out-of-range indexing Date: Thu, 17 Sep 2026 17:15:32 +0100 Message-ID: <2026091735-CVE-2026-93053-c8f6@gregkh> X-Mailer: git-send-email 2.55.0 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=3918; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ZaTUM30dyWBFjsM9nqcjNfgfcBHg7jrw8raW94bWYas=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBPZLF/g9mzVV7dCFmvlhYSs/ddZnvZ8v/n+Hrt6HR 1PLmD0sOmJZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAi2rcYFmyZUdHh+ij39ana a1yaHxTvzb059w/DguNzjcpM9eeuLv4Zuyy5SeLI0XWuXgA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: speakup: keyhelp: guard letter_offsets possible out-of-range indexing help_init() builds letter_offsets[] by using the first byte of each function name as an index via `(start & 31) - 1`. If function_names are overridden from sysfs (root) with a name starting outside [a–z], the index underflows or exceeds the array, leading to OOB write. Function names can be overridden with the following commands as root: modprobe speakup_soft echo "0 _bad" > /sys/accessibility/speakup/i18n/function_names # then press Insert+2 on /dev/tty This fix checks the first letter in help_init(), and if it is not in the [a–z] range the function returns an error to the caller. Eventually this error is propagated to drivers/accessibility/speakup/main.c:2217, which causes a bleep sound. The Linux kernel CVE team has assigned CVE-2026-93053 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 5.10.270 with commit fd339b9ef0accb2c24a5285df842552ebf5eb146 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 5.15.221 with commit 900cd6e5ef46bd15153762fb26bb03f874fccc52 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 6.1.188 with commit 6b39969c724d39b6062efa354dc2d38442bfd021 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 6.6.157 with commit 2e91ab73f9beb659f581e2a6a09f79ace1140905 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 6.12.110 with commit d7deb90c4cd086cb111f0ecc9da021218fbde1b0 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 6.18.52 with commit 5310334762c3f08f51dc2414344dd47492c07d1d Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 7.2.6 with commit ca4489b3e54666a7cac7294e71a3cf64e5e95286 Issue introduced in 2.6.37 with commit c6e3fd22cd538365bfeb82997d5b89562e077d42 and fixed in 7.3-rc1 with commit 6a19ad4d68c95185308cd9e5d169b10a2cf236c8 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-2026-93053 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/accessibility/speakup/keyhelp.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/fd339b9ef0accb2c24a5285df842552ebf5eb146 https://git.kernel.org/stable/c/900cd6e5ef46bd15153762fb26bb03f874fccc52 https://git.kernel.org/stable/c/6b39969c724d39b6062efa354dc2d38442bfd021 https://git.kernel.org/stable/c/2e91ab73f9beb659f581e2a6a09f79ace1140905 https://git.kernel.org/stable/c/d7deb90c4cd086cb111f0ecc9da021218fbde1b0 https://git.kernel.org/stable/c/5310334762c3f08f51dc2414344dd47492c07d1d https://git.kernel.org/stable/c/ca4489b3e54666a7cac7294e71a3cf64e5e95286 https://git.kernel.org/stable/c/6a19ad4d68c95185308cd9e5d169b10a2cf236c8