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 4C25743CE7E for ; Thu, 3 Sep 2026 08:27:37 +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=1788424058; cv=none; b=KNoczKMCkNIbTM0ePDbn3Wh7VfyS2k0vDRXitHjd3+41bNqDm7lSCDQcyi1YEZnvFRPHKBb44z2vSKRpP54z6q/xC3tYg9ZQZQ2dn5d9KmcZSIqE6QKmUsmvYszu4P9AMwrSTITvulOfEgbXCZUZAK7Lhn1/mVJgmvRdNLOwFVo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788424058; c=relaxed/simple; bh=/7ZXoouV1pgjg40lGf8YasemcXCTM9iv8UHNW4Ku8aw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=kLhvivqXbBeEhZJrv7xN9JJYk79gQvkVtGNJ4leDQ8ELkmDbuk4hExsKqmPFM5rMg2ORo+Ht/AOdi7fiNLxe/utDeVuOXsxLkhHO5pFQHViwhMvHwRny+5H7h4yBcx0qCN08t3CjLY6XV/DZor5YuLAbUjUq5L/YfzNwgWmO9YE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o5IcdLtV; 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="o5IcdLtV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8BD301F00A3D; Thu, 3 Sep 2026 08:27:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788424057; bh=Srp6sS+o7XjExFsiCtDpEEMEG6XqHAZkyDQ4JP+2Qu0=; h=From:To:Cc:Subject:Date:Reply-To; b=o5IcdLtVpQGFFhKgXWxItRiM8Y9PTI7EUOSAujwGwp7E30P6y+NfmPgpMMWzO6Lgk WB39rUmTpaoJd1x20j5qerctqSTKw8c5pPZnx5XX1yOSeZ8KZNzo1IKK2OSKkl1U/b 19CBUWueQ8NWi5GsPyYc1JPs3yheg6NS4DbKowtQ= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80749: drm/connector/hdmi: Fix out of bounds memory read Date: Thu, 3 Sep 2026 10:26:46 +0200 Message-ID: <2026090338-CVE-2026-80749-cee7@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=2974; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=DUPcbLBy+8NBdVSnM3YGQf3051ib9m0G4VLfXsTSeEo=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkz9e3MPRwW1WharzjT9rPB+F7Axn/BGzhW8yz60BTup MIjcs6hI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACZylpNhwd4PHayzf/9ZYc7h Lc10aq3Kr36niQwLlkzqz8zMuvNeiO1bygvt6dssTyv1AQA= 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: drm/connector/hdmi: Fix out of bounds memory read A helper function was copying a given audio infoframe into the connector's copy but using the size of the destination (a generic target, sized to accept many different data blocks) not the source (a very specific type of data block). Thus, it was copying 60 bytes of data from a 28 byte allocation. Fix that by using the source size instead, together with a build bug on the source size actually being smaller than the destination. I hit this running KUnit tests under KASAN (while debugging something else entirely). In the real world, it seems unlikely to cause an actual problem. It is a read not a write so it can't corrupt any memory. However, it could potentially fall off the end of a page and cause an accvio bug. The Linux kernel CVE team has assigned CVE-2026-80749 to this issue. Affected and fixed versions =========================== Issue introduced in 6.11 with commit f378b77227bc4732922c57f92be89438bb1018a1 and fixed in 6.12.105 with commit d9f7454c185c0c7f0973e11d62ad6c06862c324c Issue introduced in 6.11 with commit f378b77227bc4732922c57f92be89438bb1018a1 and fixed in 6.18.46 with commit e5b527804a1ea4f70e139179d3062cf5de8c06ab Issue introduced in 6.11 with commit f378b77227bc4732922c57f92be89438bb1018a1 and fixed in 7.1.10 with commit f72bb95732bc5ca87b50c52c8f087ba501950809 Issue introduced in 6.11 with commit f378b77227bc4732922c57f92be89438bb1018a1 and fixed in 7.2 with commit 9ecf8ba763d0ffe0673538eb4bf7806f20455d19 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-2026-80749 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/gpu/drm/display/drm_hdmi_state_helper.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/d9f7454c185c0c7f0973e11d62ad6c06862c324c https://git.kernel.org/stable/c/e5b527804a1ea4f70e139179d3062cf5de8c06ab https://git.kernel.org/stable/c/f72bb95732bc5ca87b50c52c8f087ba501950809 https://git.kernel.org/stable/c/9ecf8ba763d0ffe0673538eb4bf7806f20455d19