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 9CC94577E3C for ; Fri, 11 Sep 2026 19:50:44 +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=1789156253; cv=none; b=pO0tYCBZvhXClDeH+ayHDS3mziPCYA6Uzgnr6lDPV1bQC/Z9t93YgTJK4G/pKCrZUpzYsH/lGgGY9Ty9mH3+cHgBLBHBrvITADqKO6HE5Rla5PN2GnrANd0iw9IBh4XZ0BQFobeDPNqWfuDZ4wQ161ICI+FS4lgiwurhU0KAcwk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156253; c=relaxed/simple; bh=92bwSyf97C7pUFz/0Fc95D/MyREEu0lem4Oz6IBMkN0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=a83YSp1FpVznErKzfQKg+2kHDPX/yekW51bI2A1QsD3l56FUS7tqNMPVNKr65Vk3UF6Z4kF7sFsNORTuxFGmU6iH7JfFGcQ+L/vICw+WD2TQnZl+iQKuF7/1Chnla9hHfqV0dx2Hhi4I92Jn8VXoexgbG0Bc5MyT54JzGct7SoE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QLIbFFBK; 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="QLIbFFBK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E763A1F0089A; Fri, 11 Sep 2026 19:50:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156242; bh=4TLxqW0q9wW51YzkMODyrEwLwk73D0KYhCn2kquyCRM=; h=From:To:Cc:Subject:Date:Reply-To; b=QLIbFFBKK32SEoEWhFYCe2IFS/16OSRHUj4C80si8+Zp/7wepMUVp4BKQ9whb/p8i 8EuP4vVclq56UrQwOAYpwNB1s+blwDUF2BztBtk6Qt5o2kP2O4GBDsQGjS5fLHl6sx ZLv3aa+5PDuThTjdaU6RC7rKWaqLa7zV7RZGgo5o= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89452: iommu/msm: Unwind probe state on registration failure Date: Fri, 11 Sep 2026 21:42:21 +0200 Message-ID: <2026091159-CVE-2026-89452-4127@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=2598; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=/ADwCKr+AkMrV2pphwS46MYjIjJoBWQvzAbmKNZ0GYk=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIr3lvW4beEwvcb6lKrXjkeqy7uNbnKX9Kyd4W80+e 6hRauKljlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZiI1nOGeWaf5F+0RC+4F7lz 9rvix3uuHYw4KswwP+VQgTOn3vMC8anbPIR/cS2U/fs3AQA= 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: iommu/msm: Unwind probe state on registration failure msm_iommu_probe() adds its devm-managed IOMMU object to qcom_iommu_devices before adding the IOMMU sysfs device and registering it with the IOMMU core. If iommu_device_sysfs_add() fails, probe returns with the object still on qcom_iommu_devices. The driver core then releases the devm allocation, leaving a dangling list entry that later list walks may dereference. If iommu_device_register() fails, the same dangling list entry remains and the sysfs device is left registered as well. Unwind the sysfs device and global list entry in reverse setup order on the corresponding failure paths. The Linux kernel CVE team has assigned CVE-2026-89452 to this issue. Affected and fixed versions =========================== Issue introduced in 4.11 with commit 42df43b36163ed7d0ab13992e411093252903273 and fixed in 6.18.50 with commit f532401be9312ecd166f616bb74a65b0b4c150fa Issue introduced in 4.11 with commit 42df43b36163ed7d0ab13992e411093252903273 and fixed in 7.2.4 with commit 7f7074a886c4a93e3d12076ce60a510a1ebe400c Issue introduced in 4.11 with commit 42df43b36163ed7d0ab13992e411093252903273 and fixed in 7.3-rc1 with commit 535a200220ca2c83bc8bf54bd2cbe045d6ee70c4 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-2026-89452 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/msm_iommu.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/f532401be9312ecd166f616bb74a65b0b4c150fa https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4