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 E5D1A3A75AC for ; Sun, 19 Jul 2026 15:42:58 +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=1784475780; cv=none; b=tEmPWBzR0HiyeWZL4pjvK58ICYaGHWgHuxVRl14Myr8cNHdRfJb4JDvP1BdzL392MX8p9kKGo7FEltB+QmSW4GNu3ZEwAnwWhsozVswSM5iBKGtRFc42L2cL7lpeyNM95cLghtZqcgsjw6zzy8yXWKS1Tvo3+81zoM+t7HlZf6A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784475780; c=relaxed/simple; bh=EcQhP9CBs6eHhMv5wgITuUzSQqUxsYUOzBkrkeLWMsU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=iGuZnwTpymx1j/wMJ6PbBOX4nPdvMRidLQ3xnKbN/sBwcBZik7xL0+KOT9S3pu897lVsnzn4FdUfzPav7EUk3jSPmYjn5FPjLWVU65sjtX20rdP2FPWU94+9SbCuyyGFIQcdfEwTqjRP787vdQ02p/DFuPLPqDVJjUOpuV1IzLc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eAR4wDDV; 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="eAR4wDDV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 554631F000E9; Sun, 19 Jul 2026 15:42:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784475778; bh=+5CACuFsMpU2jaL0bENkY5cmgAIcHCar6ejOufOYgXQ=; h=From:To:Cc:Subject:Date:Reply-To; b=eAR4wDDVICmVUwddXuvKpeUrxcqUd4O3YgWXyGReCom/F1E+jMNUnYLcsgjTXdbg4 eq96edYMBrtt3RL8Uu3sjmXYXRvl/sxNze7RtdUKXHEhe1NWkxU3KGdZuXBduFZiCL iwAbz7aq6Lxb3h2Jjljw/W5kDv47xZnlDVLDHZNg= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64080: firmware: arm_ffa: Snapshot notifier callbacks under lock Date: Sun, 19 Jul 2026 17:39:02 +0200 Message-ID: <2026071915-CVE-2026-64080-7f28@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=2558; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=0IYb0xUoIwC+E3RF3W4BVES+sOzd/mxypvJfBwLVnZo=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkx79MrjKS1P9/f9vtfJ/tPm6PW8bMCbSTPHFa6pBjVW GHTy/+pI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACZyeC7DgtVdD3ezH/b7lyuw 1bw8nkFzMpMpN8N8H46tT/gkSn+tZ2/r2/vie8I596R9AA== 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: firmware: arm_ffa: Snapshot notifier callbacks under lock Both notification handlers currently look up a notifier callback under notify_lock, drop the lock, and then dereference the returned notifier entry. A concurrent unregister can delete and free that entry in the gap, leaving the handler to dereference stale memory. Copy the callback pointer and callback data while notify_lock is still held and invoke the callback only after the lock is dropped. This keeps the existing callback execution model while removing the use-after-free window in both the framework and non-framework notification paths. The Linux kernel CVE team has assigned CVE-2026-64080 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 285a5ea0f542db94c3ed11e01a71abb47d15cbf5 and fixed in 6.18.34 with commit d1e38551fadea230649bc428f0f35c9ee062a072 Issue introduced in 6.15 with commit 285a5ea0f542db94c3ed11e01a71abb47d15cbf5 and fixed in 7.0.11 with commit 0e7be42ef2490f19d859a6146324d48cafdc9d5c Issue introduced in 6.15 with commit 285a5ea0f542db94c3ed11e01a71abb47d15cbf5 and fixed in 7.1 with commit 38290b180a4d5746baed796d49f88d56d2f336cd 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-2026-64080 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/firmware/arm_ffa/driver.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/d1e38551fadea230649bc428f0f35c9ee062a072 https://git.kernel.org/stable/c/0e7be42ef2490f19d859a6146324d48cafdc9d5c https://git.kernel.org/stable/c/38290b180a4d5746baed796d49f88d56d2f336cd