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 915C6582B86 for ; Fri, 11 Sep 2026 19:52:08 +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=1789156344; cv=none; b=lVNsML7lQZKcKS/OhK5mKfJAG/qixEoqW3MT3GRA9tFlLlcw6clfFbYb0xA1ZCUDIHSOj6yDl9hsRXadmpOdblR5cr5KoSwn10UR7792qMwrJYhUFt9etZTUzaH9fpM8EGt8VVRzib61vZCL5QpFXNMVvu/A0D34EBrelSjFgK4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156344; c=relaxed/simple; bh=K+I2iCtBaW21Ya4R1E4Pnf+uNU11DEu1XEK83fH4NhI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bVVmV9rOjriu5UOW0OnebMSnf7qjA6dVVJqEeMDP8GucPFEMmHc/zx1sGcAqIBroUFFsCWq/WnTyEHJq2jzqfx+HytIDQrt1mJcwd0A58hR2tYn0F4aS2IvvH1odjIVmirZ5e+SCYAYFoKl9IagA1aFRyfUx6kRDP7qlIqGIpWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=RvkQ7PmN; 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="RvkQ7PmN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CAE51F0089B; Fri, 11 Sep 2026 19:52:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156327; bh=lO8ooLM1DAHN4wr1lgvrMmLoXQUzlAcpAM+QU6ZZs70=; h=From:To:Cc:Subject:Date:Reply-To; b=RvkQ7PmNE6tlHp8LgPaU/VJU1FsagRBRIssKrngHcIjYGUcTUfCL5hgH9XZ1RTvZT obUqG0f+QC2A6jucWfQAt+qAdzWdnyXiIqw5h7IZdQ4C+IMgDTQ6EC7gsu0Mi70xtN jeglU+S5em75u2Eie1oUAidPJh3rdaogjXRdrDvQ= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89446: iommufd: Release current IOAS on xa_store() failure Date: Fri, 11 Sep 2026 21:42:15 +0200 Message-ID: <2026091157-CVE-2026-89446-12df@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=2460; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=U1Vy+owEEwyDvu0iAXFHFtJehk40TyMs8gpXLSDNxoc=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIj0rWlNePrR/9S521guBwIYpIv2TvufFruZaXaIUw zvt6pb6jlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjIy1CGudJ3lcKm//kVEjYz T2KL9ormb9qmgQwLls7oXrlvq/eOg+oy/8rqf+RLefKzAwA= 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: iommufd: Release current IOAS on xa_store() failure iommufd_take_all_iova_rwsem() takes an object reference and the iova_rwsem write lock before storing the IOAS in the temporary ioas_list xarray. If xa_store() fails, the current IOAS has not been inserted into ioas_list yet. iommufd_release_all_iova_rwsem() only unwinds IOAS objects already present in that xarray, so it cannot release the current IOAS. Release the current IOAS rwsem and object reference before unwinding the previously stored entries. The Linux kernel CVE team has assigned CVE-2026-89446 to this issue. Affected and fixed versions =========================== Issue introduced in 6.13 with commit 051ae5aa73d782a8be2699a11e17c68f28b4e758 and fixed in 6.18.50 with commit 4c33d00ad9a911e87ea222986f732ce072e3aa26 Issue introduced in 6.13 with commit 051ae5aa73d782a8be2699a11e17c68f28b4e758 and fixed in 7.2.4 with commit 07b4fe1367f076886c1c47a19c70936138325087 Issue introduced in 6.13 with commit 051ae5aa73d782a8be2699a11e17c68f28b4e758 and fixed in 7.3-rc1 with commit 4ac2ce123824d5f885c868fa1f9f4d463141a2ba 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-2026-89446 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/iommu/iommufd/ioas.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/4c33d00ad9a911e87ea222986f732ce072e3aa26 https://git.kernel.org/stable/c/07b4fe1367f076886c1c47a19c70936138325087 https://git.kernel.org/stable/c/4ac2ce123824d5f885c868fa1f9f4d463141a2ba