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 C9FF93A59BC for ; Sun, 19 Jul 2026 15:41:18 +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=1784475679; cv=none; b=F1iGYMgXZnKxM9n6ojuK3GWR0CQzFhpeqk4cAyronMVP3OcCuXTO0irGOhASgb7BBoH/gloaX+2p29/2T+5Rf4nXA0Xi9RgXTbK7p9gxTDjLXb3UQXwqXFBI3i3li53b9MqquIPaQJUopF4BNRNyO66eEk3hny2b3duJdCJMzVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784475679; c=relaxed/simple; bh=mGQAIDXsJhTACCIRz5vZ0M26Hg87n/Ui6WwYudf4fds=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qyuJDwXrqDhQpsj774iJ1oKQQqMEtDr4srK3SB6svBpTFMhuBlIbRM6zifx3lIv1yTe0fBBHkw0Qx7J0bYh9A0C9BID+SpJUK/dDVDL8sSa7TOaLXLC/DabCQkOn79Bn/asqj80VuOhO+IeuV0Bhgf9zzGwp3UfuzXPb5Ia0nr8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hAnDm9S9; 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="hAnDm9S9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 396691F000E9; Sun, 19 Jul 2026 15:41:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784475678; bh=+vOOhe8igRr4O+0NWQjqddolEcqaKH+vOvxByXYp+AQ=; h=From:To:Cc:Subject:Date:Reply-To; b=hAnDm9S9dp6W6BAYAS4eiU+yiTqCWIS0ge6ArIhD7UE1Ajstgk+202Dhs0NSG7rr6 bFxQCXcRG4lYlFli+0E6I5144l8lJfblHMstgz+GguslA4QLzANlHattEZiplg/7Jn wzelJ8wM3EFOP8H63MsxtqCtR0xtDvi7ufOog/UI= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64018: net: mana: validate rx_req_idx to prevent out-of-bounds array access Date: Sun, 19 Jul 2026 17:38:00 +0200 Message-ID: <2026071901-CVE-2026-64018-43bb@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=3359; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=6tQpQ75FwAlPjfH6r/dJq2UZUylu5jJyUKx5kCqC47g=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkx7yMPhzWem2bV59Yvksv2LDBSZ3rL4u2T6gwSbGUL2 sO4lrF2xLIwCDIxyIopsnzZxnN0f8UhRS9D29Mwc1iZQIYwcHEKwETibjHM04uZz76xR1Zi108P D5erz84+rvl2hGG+n7yu0rf97atXTCv3PKUuw+dX8ncpAA== 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: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array. The Linux kernel CVE team has assigned CVE-2026-64018 to this issue. Affected and fixed versions =========================== Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 5.15.209 with commit 5ddc715324badd7f2641bc177db1d027b402adae Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 6.1.175 with commit ff1d5af207bcea857d45fe81505f1bc4b29eaef0 Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 6.6.142 with commit 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 6.12.92 with commit 763a372d344fb12fae566d36ddb46e92454ad58c Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 6.18.34 with commit fa627a5eaa83fc0261f44ef3769693b886ca6e27 Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 7.0.11 with commit 355e9f2b2a7887ca38100127989af3e422ba71d0 Issue introduced in 5.13 with commit ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and fixed in 7.1 with commit b809d0409991b75a6cff846a5ac27c3062953f84 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-2026-64018 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/ethernet/microsoft/mana/hw_channel.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/5ddc715324badd7f2641bc177db1d027b402adae https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0 https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27 https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0 https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84