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 0EEA140960C for ; Wed, 27 May 2026 13:05:40 +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=1779887141; cv=none; b=ezrCODNSdSwGXy3oqyIv87VaT0WaIEeaXudwZbwNXzyL3aiWJ0pg7ZKk4rFCHSfZTibSkqhKTvBhKNxLJ5j4gO5zmJj3AFhOipD57DEkeJveVCmoPux+WJlz416vSJgLPNGQ49tRZO6j7IH1RPGa0u+xRKL1uVyaOVdoCpok7YE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779887141; c=relaxed/simple; bh=Lk9/jP02rmHXJoNJfPWPGGTDG+yi8dgyk71zH//QOo8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=i5PZv44ejjaxCOnuI7Affkvq59cF+/8fbLOFkvSPl1r5VggxJ00Z0660/xBzNNZPCv2SnAZD6W+/ZuZN19eRp01PRvemAdLW4EXec7YCnuTvJrmL1t+nPnO13GxvKId1e70JOkUQA1+L2p47n0Gfe9aJpU/rXxEXueToDL8DTXY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dnduegpx; 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="dnduegpx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45D361F000E9; Wed, 27 May 2026 13:05:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779887139; bh=OshCq4ZP4fa6qBoaqAspniQEnkMsst4OVaws9us02gg=; h=From:To:Cc:Subject:Date:Reply-To; b=dnduegpxLo/golxFCJos42KJLQ39yBj5R5l2SKkfRMsVX19+LckTt/HF+Qf4meT0r 5UCW+wnJ4YmkHj+86zfDRs1Te5XAHJi64beOmJEtm64qDGwHOJ29ry7VQr9BJ2ukac qbXaZ4v0WG61DgSSX5KuqLlBZGqqvUM3+bcUJX1w= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-46092: wifi: rtw88: check for PCI upstream bridge existence Date: Wed, 27 May 2026 15:00:23 +0200 Message-ID: <2026052703-CVE-2026-46092-7130@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=2273; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=dYrNNNt361OhHRTE+XUTkgxqk+vwVEI8phHKCVw+MWo=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlir6af31mgW5xy7Yaj2vcrW5Y8mb9//QMn5RMFxw8+W Xdt5vSSzx2xLAyCTAyyYoosX7bxHN1fcUjRy9D2NMwcViaQIQxcnAIwEYdWhgWbG1qd+Sa/OxX/ ZYLQJge7Np4k+0qG+a7W198d7+DqMvmwhb0v9fJZo8dfFwIA 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: wifi: rtw88: check for PCI upstream bridge existence pci_upstream_bridge() returns NULL if the device is on a root bus. If 8821CE is installed in the system with such a PCI topology, the probing routine will crash. This has probably been unnoticed as 8821CE is mostly supplied in laptops where there is a PCI-to-PCI bridge located upstream from the device. However the card might be installed on a system with different configuration. Check if the bridge does exist for the specific workaround to be applied. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool. The Linux kernel CVE team has assigned CVE-2026-46092 to this issue. Affected and fixed versions =========================== Issue introduced in 5.17 with commit 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and fixed in 7.1-rc1 with commit eb101d2abdcccb514ca4fccd3b278dd8267374f6 Issue introduced in 5.15.17 with commit 617339466fda09916c4b4151fa5e6a9c1fdae353 Issue introduced in 5.16.3 with commit f21e8cb927fa9da49490b74ddda3856a828b82d6 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-2026-46092 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/net/wireless/realtek/rtw88/pci.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/eb101d2abdcccb514ca4fccd3b278dd8267374f6