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 DAE073845B0 for ; Sun, 18 Oct 2026 16:03:53 +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=1792339434; cv=none; b=pqts3ByICcAosAn4ACMDonRoZGjZf5aVUqZwhpyDQcsyRujiuMWP10h6qCnMvue8YuJjIy3iF3KhSdTPjw+Zoi+XSAFOn7mfRSbDIJPEYgupwOq7uPPCUivQL9dbq1J6GQ+EG/XUT+XulusK5VgPvfWJulZLYbByopVEMms6s4U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792339434; c=relaxed/simple; bh=hmIlyi7k2lP1e8c74OkdiEhDqc12J9JFMxCDaEEPF+A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=np9Fmv+nwiWppcdHiWRkW3EZkPje62loC9LoQcNm2K67YNXGznywa7X39ZiphUfpo5g9xwvDTPFYPfYNHPf5BSdm3DQoKhBYJu0tD1CwXgVMIWLLozSOPEhBk+/W7DWuTnfmcV3hiyU5n3TuVDSr2GykcmCTRqKy3ARkFQBdvh4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2Ks8NSS/; 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="2Ks8NSS/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A08BF1F000C4; Sun, 18 Oct 2026 16:03:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792339433; bh=4fNOMlVS7hIh9Wa8fA21itljDXj05v/7gElwoJWDaFQ=; h=From:To:Cc:Subject:Date:Reply-To; b=2Ks8NSS/iNkGaLixxSXQ5s30jXaVZ52b4kfluNPtfHYItQAXs9SqqZpZ+weqe6eis 68KFZvrK5KW8LojpnL0tbUPF2ox9XREzeFiVykW0TzYykyvsTFlBYBqd/N6GqLMsCC QXHbmzmU0hLbyfXnQFlSjYDC80s74HysG5AzbcMM= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98751: tty: abort break signalling on hangup Date: Sun, 18 Oct 2026 17:45:26 +0200 Message-ID: <2026101815-CVE-2026-98751-86a5@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=2745; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Xj+X5oOn3mVH2Pckdfk20VIeTvzg9zlmwDDTD21iwYs=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXXvor3i2MYtt9lDFZ8QG/35aqD5IP959JVxU71F3dy b1RJzqsI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACaSl8ywoCVhJ2Ns33G5T7O+ /zjuz8po3FXRxDA/dNar18Lrb/EefMTk9UOX5XHZEt4SAA== 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: tty: abort break signalling on hangup The break ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Drivers must handle this race, but TCSBRK and TCSBRKP should still be aborted to avoid calling back into the driver after a user-controlled timeout (possibly even after the tty has been reopened). Note that drivers should disable any break state on shutdown so just return on hangup (calling break_ctl() again is racy and will most likely fail for drivers handling the race). The Linux kernel CVE team has assigned CVE-2026-98751 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.26 with commit f34d7a5b7010b82fe97da95496b9971435530062 and fixed in 6.12.113 with commit 3bc82999fb85cecc7eb6ec1755ee7d698aa1e783 Issue introduced in 2.6.26 with commit f34d7a5b7010b82fe97da95496b9971435530062 and fixed in 6.18.56 with commit 94af6cd832e9b4ce39a8fb59144a8f09ab56fd35 Issue introduced in 2.6.26 with commit f34d7a5b7010b82fe97da95496b9971435530062 and fixed in 7.2.10 with commit c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6 Issue introduced in 2.6.26 with commit f34d7a5b7010b82fe97da95496b9971435530062 and fixed in 7.3-rc6 with commit 845a2737e0f5ffe5ca8d38de556012b0c9472cdd 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-2026-98751 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/tty/tty_io.c include/linux/tty.h 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/3bc82999fb85cecc7eb6ec1755ee7d698aa1e783 https://git.kernel.org/stable/c/94af6cd832e9b4ce39a8fb59144a8f09ab56fd35 https://git.kernel.org/stable/c/c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6 https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd