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 1ECB23BB699 for ; Mon, 8 Jun 2026 15:42:07 +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=1780933328; cv=none; b=RTWB4H7tnvdtHvg3kQZmBSeRzmqR3260u9UkoCCaR0lUHtK6EoR7PCrIMiQSgFpOgm3+dCHgu37fMGEc3Xi2ijUdnRD9XhFZIDjtJsJkhEyl1GOFIN8Y2iESi0OkIYWiprzzLmJnLLVqViWvAhnWhij5xB4AaxFaVdJKoHno/kw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780933328; c=relaxed/simple; bh=i/D/AsceSS0/XPI2yU71dgnpHiVLws9kg/4gwwWR9Cg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=eWuCLe3MakGIz/h0nPc3yKfcSfAa+sfmDz308fCse72K/AXk8gdgzG79ETwhrEWpyreLwu/DXRkbzR4PexBnWwoN2hZ3KSkIXp/LsK6TTn5sNw4RNjrMFCwnK+FcGq0g0OTn7EEQm3WQcd3e+qhhwCOpJZsxJbz1LNnyiouWw4E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V/oYyU3H; 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="V/oYyU3H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 632C21F00893; Mon, 8 Jun 2026 15:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780933327; bh=tAuLHU76PsGp2AtwcEvzglMY/H/+nD4A7tPoUCQAwFU=; h=From:To:Cc:Subject:Date:Reply-To; b=V/oYyU3HhyPVxvzJjOlv20q4FasKanBWkec/eZIEglswea/Kxh9p/z9+FWycbI/za UAa5WfEjqvnYP/LLj7rT7ZFejYqPjf7lCGSqhhGLUsopjIiQ51WcyA62eIQqVmaJKJ xU4PrNVROIC0SA53VMiVkoJIIBxdBXs9zKh3VQL4= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-46288: of: unittest: fix use-after-free in of_unittest_changeset() Date: Mon, 8 Jun 2026 17:40:52 +0200 Message-ID: <2026060844-CVE-2026-46288-76f3@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=2731; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=2l6OOuWNPUPdvlt24p6Owy+22NJmAweD3+io8TZnlm0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlqj2o+z1Wpv3SA5cGvE4+F5+xbr5pbxLSG7f89pQrWq bqOASkOHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCR/BsM87P78nqniKpWrf/m +X3LauXia+W7Mhnm5/9KZe89XLco4XbfnRiOtD1TnR6vBAA= 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: of: unittest: fix use-after-free in of_unittest_changeset() The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free. Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF. The Linux kernel CVE team has assigned CVE-2026-46288 to this issue. Affected and fixed versions =========================== Issue introduced in 6.12 with commit 1c668ea65506e67ce2eae07b69bb09fcdd86e309 and fixed in 6.12.86 with commit 37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1 Issue introduced in 6.12 with commit 1c668ea65506e67ce2eae07b69bb09fcdd86e309 and fixed in 6.18.27 with commit 7f0f0926f3010b10cff5e93446258f971e42f2fd Issue introduced in 6.12 with commit 1c668ea65506e67ce2eae07b69bb09fcdd86e309 and fixed in 7.0.4 with commit 6fdad20b7975bdc32e85b45f8f7c640f6687b81f Issue introduced in 6.12 with commit 1c668ea65506e67ce2eae07b69bb09fcdd86e309 and fixed in 7.1-rc1 with commit faecdd423c27f0d6090156a435ba9dbbac0eaddb 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-2026-46288 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/of/unittest.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/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1 https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb