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 055D12561A2 for ; Wed, 25 Mar 2026 10:29:28 +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=1774434569; cv=none; b=RN9Qjf77ojfcM+3LpavkAszSMRIsGC+4F6QBKiVa5j5QCTUcYNIW6V0SGP6mrl5wnCzNo7ZNDTPyRCntvkmFYwpy7MBMtq4URguqU4SSdfP8tIRbhkhKwth45vhD8zoR/A4K0sgz0tJpyggD2z0ofSox0XDE/GsSQcC4uk+SXF4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774434569; c=relaxed/simple; bh=R141+ILzQcOKX/XvatekQabVp/w48W1C4TvzZAm9u/U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=G3KunqC4hT9dVClTggQDZST204Z0jHQ6UXtnomtdR5tBwIyaLSNg620vn2f7t+Y/e1SYhWT2J2a/UWi+ZkC/n52g1M9X6NZbAogjAmzivZa4NB5tCN1qBMytVKYiuFCvZ9L4t/p03/Ud8QO2NpfVCdYCGfZtAX9hxGLgOzeqk6g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=L0TSrMQ5; 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="L0TSrMQ5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C1A2C4CEF7; Wed, 25 Mar 2026 10:29:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774434568; bh=R141+ILzQcOKX/XvatekQabVp/w48W1C4TvzZAm9u/U=; h=From:To:Cc:Subject:Date:Reply-To:From; b=L0TSrMQ5bbpMX1DvGeMEELJzqcn7IjSqViab0aAwxDGmLQHh/Y3byZ54d76SnBp+6 J/iocn8JT7D020Sx6SbUaXfhlTff4Ds0QX9H/rCNPf6kK7RcL5TGjkbb4am8Bqg5Vj E2U5HxVq5okJ2y7YO2RH+hXqf1xZI/qzI16lHdSc= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-23302: net: annotate data-races around sk->sk_{data_ready,write_space} Date: Wed, 25 Mar 2026 11:26:46 +0100 Message-ID: <2026032527-CVE-2026-23302-e03d@gregkh> X-Mailer: git-send-email 2.53.0 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=2336; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=RrnKGShyRd5Kf2RS0ICmZyRgZFyosIopHmrKACcqUO4=; b=owGbwMvMwCRo6H6F97bub03G02pJDJmHdwQHtS6uKaluYt5zUnlFbmDsjdX7Dn37GSv0RpBz8 tGGBQViHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCR+WsZFpy4rOHAef6dbbLw W5XZHe9/OarP3s4wP2gt890btcp90n+yKo6tZnus8OqyHAA= 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: annotate data-races around sk->sk_{data_ready,write_space} skmsg (and probably other layers) are changing these pointers while other cpus might read them concurrently. Add corresponding READ_ONCE()/WRITE_ONCE() annotations for UDP, TCP and AF_UNIX. The Linux kernel CVE team has assigned CVE-2026-23302 to this issue. Affected and fixed versions =========================== Issue introduced in 4.20 with commit 604326b41a6fb9b4a78b6179335decee0365cd8c and fixed in 6.18.17 with commit f17c1c4acbe2bd702abce73a847a04a196fab2c5 Issue introduced in 4.20 with commit 604326b41a6fb9b4a78b6179335decee0365cd8c and fixed in 6.19.7 with commit 27fccdbcbbfc4651b6f66756e6fa3f52e051ec23 Issue introduced in 4.20 with commit 604326b41a6fb9b4a78b6179335decee0365cd8c and fixed in 7.0-rc3 with commit 2ef2b20cf4e04ac8a6ba68493f8780776ff84300 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-2026-23302 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: net/core/skmsg.c net/ipv4/tcp.c net/ipv4/tcp_bpf.c net/ipv4/tcp_input.c net/ipv4/tcp_minisocks.c net/ipv4/udp.c net/ipv4/udp_bpf.c net/unix/af_unix.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/f17c1c4acbe2bd702abce73a847a04a196fab2c5 https://git.kernel.org/stable/c/27fccdbcbbfc4651b6f66756e6fa3f52e051ec23 https://git.kernel.org/stable/c/2ef2b20cf4e04ac8a6ba68493f8780776ff84300