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 8AFC158FD10 for ; Fri, 11 Sep 2026 20:04:16 +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=1789157063; cv=none; b=gpeHR5UlG+g6qUu/edxYd0LQkRdhezotQPOkH2Re32tDbFKEWHDId/n1BwtLppcW/u3w5hRycPwyZb2jjxqR3EEjvBJIvZUsThXJcOqT6rMjPY+FLGXHp+/aLl9/BhFM6KfCy6PNgPKN+0bs2RrlKy2rJeJtza0qWPrdwvgH0sI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789157063; c=relaxed/simple; bh=JoAXzoWJxGcyus16imleoCvPQgHe4BWKvapA2HLWm7M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=D+UqYIzasOrpXUpyGFwbT0c29Zg0YRxVfJ+OYNxrHzJqYLpM4mBXNGuBJSFO3O2aE2norVIXS6fM/upJ8SnBkyGCUEptUnqzbmvFDEgTZ7UpOWeqlZ/l9CPYVoPZYLG3WWKUHsdHBVxMfJwz7xaNrPeTiLhuIGtvPpsX8+8BYzc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V6WrU4bb; 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="V6WrU4bb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 107111F000FF; Fri, 11 Sep 2026 20:04:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789157054; bh=muZ+dUPwtVVv/FmuaYvWgqoDJwTpJq7M6gRwobSXUrk=; h=From:To:Cc:Subject:Date:Reply-To; b=V6WrU4bb9miQbrqMQHNxAKKNWf/Omh3MGKoFDGy/46CFLG44Z7hbFfR+Z50lVeWZ4 HgH7ZhnzCC85qizaAl4isDNko5B0wy6jhWt41inSEHk0lEbIYG/cFaHDZXmJ/HaY7F Lh42FqMrgRbshDQRdiQbXkk+YBcVMWQ06DBQ9DrA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89721: phy: rockchip-samsung-dcphy: fix out-of-range max_register Date: Fri, 11 Sep 2026 21:46:50 +0200 Message-ID: <2026091100-CVE-2026-89721-1e76@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=2414; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=skj2sx7O0hLND6ioyjVQdY0owLHebnJOgpRHG5Cz6JM=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIjvU30qfnZ58wSawya57T9G0d60THvK9WLq3a/PEf 8u3ZPo96YhlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJFCsxzHe7dplBdcejRT2n Fv37v/gS05PMy/YMcwVOs8ssKooIlAjl+mnyQ437wauv1wA= 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: phy: rockchip-samsung-dcphy: fix out-of-range max_register The PHY register block is 64KB, so with a register stride of 4 the last accessible register sits at offset 0xfffc. max_register names 0x10000, one register past the end of the mapping: dumping the registers through the regmap debugfs interface reads beyond the ioremapped region and oopses on the unmapped page. The oops fires with the regmap lock held, so later PHY operations deadlock. The Linux kernel CVE team has assigned CVE-2026-89721 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b and fixed in 6.18.50 with commit 14afe18655c0951f4f85898f761bf92264e65ccd Issue introduced in 6.15 with commit b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b and fixed in 7.2.4 with commit c1a62f9dcf531d56c56da2e4435386b6d264c69f Issue introduced in 6.15 with commit b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b and fixed in 7.3-rc1 with commit 4486e75ba647bd8b98fc1f053101b40caceeed4b 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-2026-89721 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/phy/rockchip/phy-rockchip-samsung-dcphy.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/14afe18655c0951f4f85898f761bf92264e65ccd https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b