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 434953A873A for ; Sun, 19 Jul 2026 15:44:55 +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=1784475896; cv=none; b=sfZEYC9n1mNSEURbHA8NU/dUB2Qd8xx9OOfve91Y6xDzEvc9RdFAy4dFpmZ4UrhE5xOt3lykm7MyILUHpYz0pDEpP8R/thonhC1RycsSJjp7+8qGB3YqNg2BX8yffrqqbCurTeS3esIc3VMrdebQlhFmbDd1P5z0ab1O3snk0I4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784475896; c=relaxed/simple; bh=hLrnGypRPfXduzTMirS14TlN1Wr3NLsdwk23wnillZU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=pFDSVJCpEIWOyI+L/HQWY7kiw4zFDp4W6UGcOaVyPeBASO0pQjMBgInsqAszoIE2LkCu8StLlKWtff1oAqoDelOuBcXxjzk8N4WUy1MTygTRrAdjdmNX389J1nUC/O0NPUGdFseBVtUVfq6XZ9vgoggTR1eguPOhsefaYIQ3qGo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dO0uV+ht; 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="dO0uV+ht" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A0F761F000E9; Sun, 19 Jul 2026 15:44:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784475895; bh=bYBl5zOjLTW2WONHYDCQZbzCTAi7Srk31BlLs54PAuU=; h=From:To:Cc:Subject:Date:Reply-To; b=dO0uV+htuz9WmoyT6AuvPf0N6QZuzAtEsP9/DF+gaXAXh/jI9JWV+hnYonYEFGZ7E Lx5uLE1dgO2FcGuHr7X2QgN0GY0cGgxHeGIh9fJz8fDYqZm6uysFgyYGmkoKXDPLLH uCXuiqEe8uPDo2X8HD6DZmKo0Y9jLyJ1is7+mUpM= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64122: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover Date: Sun, 19 Jul 2026 17:39:44 +0200 Message-ID: <2026071925-CVE-2026-64122-3ed2@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=3145; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ey2Ab/dLmTESzYwdx4aolUwfb15NoonZlNdaYiWuT1Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkx7wtnMX46n7iTxT82MXfay0nrLPOmyZ0wPVl18f3Kd /Z1D5/v64hlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJJF5jWDD78h2tqS9tSp97 +gp0JHmy3br07iDD/IIILj2bTVda+3qdJI54n/Sc4ikgDAA= 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/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown. The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent. This fixes the following KASAN splat: BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277 Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30 The Linux kernel CVE team has assigned CVE-2026-64122 to this issue. Affected and fixed versions =========================== Issue introduced in 6.18.14 with commit 4329514c61abefe4961541b128c549b017bab5ad and fixed in 6.18.34 with commit 1604a2d68414aa4cc34faac0b7faa9c14455e8d3 Issue introduced in 7.0 with commit 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 and fixed in 7.0.11 with commit 152295aa7dc2c5e046606f7dadc84fce41136446 Issue introduced in 7.0 with commit 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 and fixed in 7.1 with commit 7d260c5d2d89eb2c8c528d54b576b3aae3e20231 Issue introduced in 6.19.4 with commit 63f9d5fb4d8040077df801ca3270e2f02d55e0d9 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-2026-64122 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/mellanox/mlx5/core/en/reporter_tx.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/1604a2d68414aa4cc34faac0b7faa9c14455e8d3 https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446 https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231