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 B4A6639A060 for ; Fri, 26 Jun 2026 19:42:16 +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=1782502937; cv=none; b=FhH2RbaM+wuFEUag34Vjy/oyeq/BbAU8i6z5fOzyLAtSa+LvihJc7Lirw023GETZhsNdHn83dvm/1+kN2bXZ7vpMyIwCIxBOxAqxx8sPuAYkcgSYAw7vDh/1clI9QS1nPR0SPj3DvXBxyXO2yPhFU7yBqm0dW58vcKa7+E4roOM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782502937; c=relaxed/simple; bh=UIrEv5rV45N4HhGz5PRQSpD0BETbi1b5smLh2MejZzk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ks6MRA+Sm64hZaK8VAP6h1fSkUvnm53k0ARDP44GVfq5Bbh9J27JEUZVn5UwTyS/faMSpGU25clIdCrp090lWCQIiUTg4HDPmuAbQFfWOV4+nFpwrQ+R6+KGZiVUuLmes04c5lKry4ZPCnKqjRMExfgee1Fum+cJJ/xi8VfuQoo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Xx+Ijcg+; 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="Xx+Ijcg+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F8F61F000E9; Fri, 26 Jun 2026 19:42:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1782502936; bh=VlVGpe/21aBzGeRpBN0FOaCEAI+phElyzDQ4k2Y0vxA=; h=From:To:Cc:Subject:Date:Reply-To; b=Xx+Ijcg+JTMnlIQySPFGyw3rqISV1z1ef1ZHbmB2tk0hZlXuI5rpbG6mXLHqeylfS hEOwqESuP5NjlQ0oPKCKP/q7YyPDb1s6jEIxMYER07UeP4rCd/oQe0OFtmBsEemGEl gAOgG+JBJMZWvO23Dvpy/9lm5YdcPijxM2qiw83E= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-53294: mailbox: mailbox-test: don't free the reused channel Date: Fri, 26 Jun 2026 20:40:27 +0100 Message-ID: <2026062617-CVE-2026-53294-0b30@gregkh> X-Mailer: git-send-email 2.54.0 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=3306; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=/Z3cNGuqr771y+pLqgrbYRNAR5Lol7qumJt1jr0XbNA=; b=owGbwMvMwCRo6H6F97bub03G02pJDFl2Vxc+0jbkV3l9afmLOy3WBq3rTl+7/3bPtlQT+edLy lcsulxr2hHLwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATMellmGd+1tXx6V2hVzIB WW9k9BZIh/rtX8GwYM6+MstJpZHP/ux0mrZPo87WUCp0AwA= 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: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs. The Linux kernel CVE team has assigned CVE-2026-53294 to this issue. Affected and fixed versions =========================== Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 5.10.258 with commit fc0089f82c3e36060c2c79156bc2018bfb16b56b Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 5.15.209 with commit 5d4f3d0f64f1016cb78b400a70b67df91fac99b5 Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 6.1.175 with commit c494a11da45ad7ec9b0ff216c3e3ace351193bb6 Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 6.6.141 with commit 3afca89fae501dbd7421e1777b5b8f033b1d98d0 Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 6.12.91 with commit 5c209299b0113e289e238fa5f2e8f00c59f76060 Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 6.18.33 with commit 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 7.0.10 with commit 240c71a2aea36a1a4210f911a1c32ea88777e8e4 Issue introduced in 4.4 with commit 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 and fixed in 7.1 with commit 88ebadbf0deefdaccdab868b44ff70a0a257f473 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-2026-53294 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/mailbox/mailbox-test.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/fc0089f82c3e36060c2c79156bc2018bfb16b56b https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5 https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6 https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0 https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060 https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4 https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473