From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6C7F7285066 for ; Wed, 18 Jun 2025 11:02:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750244574; cv=none; b=YCtvXpCSoxkGRhCYC6xWxB0oHHqakyWwJAM6XXVnNylTthRtDVc0jYkOdB0iTmIqSxTWLoG2AaqIxTKDmeOVWR/V1WDP637CrVsQDZnVzQ6IZ2VDvjf6WDnoh5hgshQLm0y6xCfrSXYBqoTDb3o1yPc+BtOLeC5bqKSLhSPnN5U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750244574; c=relaxed/simple; bh=czQZUVPbB6WA5Y5H6MuvAqy6u4sf01SrcB2FICmS2MQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NZDmp0Pw3Ntmpm5ikwa10zBs8CkPv2+Vr7nqlEvUB7lpr5EWFoxo9PF6nT9jvErwR0e/hNCII/9mc/pm9BtEImaxy1aR1c+IE8ucb/bTM++mmhj8Zq1Iq78KZk6/1hD81OGb+EeHRSR1kbS9s1vKJ5kS+2O83pbvOM4uJgAUTHk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=HIves3jw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="HIves3jw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEE70C4CEE7; Wed, 18 Jun 2025 11:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750244574; bh=czQZUVPbB6WA5Y5H6MuvAqy6u4sf01SrcB2FICmS2MQ=; h=From:To:Cc:Subject:Date:Reply-to:From; b=HIves3jwj2N3AM922HQVoNNF35AALgVah5Ubhy9dElNqLvQXJNVhvq3gAxesNaDPg sSOtzq1peORK2g1aDdU35PM/KtFmD0ALQ6SIBpDatvD8JeA+/eh4CUl0kdtlnL6vRB 8Yu8cmW6wDv1c8DZ2m3Gb+JfuLtj8N3FcENdo0OU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49948: vt: Clear selection before changing the font Date: Wed, 18 Jun 2025 13:00:13 +0200 Message-ID: <2025061809-CVE-2022-49948-e2a9@gregkh> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=2881; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=3L7QN9wfhSt5OuI7XM+T35ovlhrcXIejlYAeypY03nQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDBlBcyzb77RdTezU0Fm4YMkJ11f+fMqP50hvX1AkOs3op 6bRtewHHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRnBKGeRZpnypzXj8/0d08 zZL5wryNAcvTjzMs6CtdYlfEa2Eo8u2gd4eiY/G0lbdkAA== 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: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called. The Linux kernel CVE team has assigned CVE-2022-49948 to this issue. Affected and fixed versions =========================== Fixed in 4.9.328 with commit c555cf04684fde39b5b0dd9fd80730030ee10c4a Fixed in 4.14.293 with commit e9ba4611ddf676194385506222cce7b0844e708e Fixed in 4.19.258 with commit f74b4a41c5d7c9522469917e3072e55d435efd9e Fixed in 5.4.213 with commit 1cf1930369c9dc428d827b60260c53271bff3285 Fixed in 5.10.142 with commit 989201bb8c00b222235aff04e6200230d29dc7bb Fixed in 5.15.66 with commit 2535431ae967ad17585513649625fea7db28d4db Fixed in 5.19.8 with commit c904fe03c4bd1f356a58797d39e2a5d0ca15cefc Fixed in 6.0 with commit 566f9c9f89337792070b5a6062dff448b3e7977f 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-2022-49948 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/tty/vt/vt.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/c555cf04684fde39b5b0dd9fd80730030ee10c4a https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285 https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f