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 130BF3A9637 for ; Sun, 19 Jul 2026 15:45:09 +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=1784475910; cv=none; b=Uiv/xXnnGrjwK7E0g+GfJEwq62ImqwyjjF4RldOWP7MO2PGbd5USbrNpvBmMs3ZdsqGI3TG1/oZyPScdYtqEfvGKWtKnIkGODRe59YePLJnW2zjmiviYCIsnyCxUkE4I7zsTo8DAaKPTprasiiZDNXzsD1wE1lDQMH8fUiU13Y0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784475910; c=relaxed/simple; bh=l37FWvee3h+VuiODksl17/RN4rxktKd5clNLl4sfXqg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=pgvTswKe+n0+IYsbw4z46zowAGaTIEUGHKBTzGbfq+HzvLnhf7AoGBnGqezmRQyyOmTVfKXCMwX/1dAakwQPudxAYj0G23T9fLh5oQQP8YA5UD1qRqJ2f4BTantNjF6nGvmSy2tRlN3l+eF8AKePTqMR7bBNTJTXrpz9oJWNvmk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eFpROfVM; 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="eFpROfVM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 75E0D1F000E9; Sun, 19 Jul 2026 15:45:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784475909; bh=dXKz20S/t/A3tEXhwkrnZfC94x+4pO7LhyNxvqlfQ2Q=; h=From:To:Cc:Subject:Date:Reply-To; b=eFpROfVMhHryFkueJslvX+BG0Dd2N93LrLkLV9m6JS0xzvaIQx2xoTxwRkSqaP5vt 3TllPjPjWFFjYCNqxL3yDlkuZfN688uaqZJblbMl697mf1ZONUwMKk1vSW1A+Zu/4E hUaX3nnT2kM4WklAy0us19GpLyJXOca65lbCCHPA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64092: batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown Date: Sun, 19 Jul 2026 17:39:14 +0200 Message-ID: <2026071918-CVE-2026-64092-670e@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=3541; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=xkuln6ZWf+ZYzybbKDsUjoM8rUUdVhdhhckUSoxnAtg=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkx77PWLX15QCmaV+5L1/3DNy+dD3y3odPqL//CF34PJ 5jtlt73syOWhUGQiUFWTJHlyzaeo/srDil6GdqehpnDygQyhIGLUwAmckWNYTb7+QoFuVqe96F5 zc7axsZKNlIbbzDM09+spdeiIp1i0zpXgUPm718t1/p7AA== 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: batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown The receiver shutdown timer handler, batadv_tp_receiver_shutdown(), is responsible for releasing the tp_vars reference it holds. However, the existing logic for coordinating this release with batadv_tp_stop_all() was flawed. timer_shutdown_sync() guarantees the timer will not fire again after it returns, but it returns non-zero only when the timer was pending at the time of the call. If the timer had already expired (and batadv_tp_stop_all() would unsucessfully try to rearm itself), batadv_tp_stop_all() skips its batadv_tp_vars_put(), and batadv_tp_receiver_shutdown() fails to put its own reference as well. Fix this by introducing a new atomic variable receiving that is set to 1 when the receiver is initialized and cleared atomically with atomic_xchg() by whichever side claims it first. Only the side that observes the transition from 1 to 0 is responsible for releasing the tp_vars timer reference, eliminating the uncertainty. The Linux kernel CVE team has assigned CVE-2026-64092 to this issue. Affected and fixed versions =========================== Issue introduced in 6.6.140 with commit 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 and fixed in 6.6.142 with commit 0b1bedf114ea93fef929b31f0d70a9eedcc601de Issue introduced in 6.12.90 with commit 26dfeee8db81354bfdade155f27f9e16510ad196 and fixed in 6.12.92 with commit a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0 Issue introduced in 6.18.32 with commit 03660dab86f93319178a24667f6998526dc4355d and fixed in 6.18.34 with commit b285bc0a97f43823a4967fb6d286de4c7f53d541 Issue introduced in 7.0.9 with commit 8634c1dbd73adb74d40533ebb7e914efb82e71fb and fixed in 7.0.11 with commit d078501dde9b57210f1808cdef4b59463d1f5fc8 Issue introduced in 5.10.259 with commit 5e7d0ac936354c36810e74ac3056b334ed1f4058 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-2026-64092 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/batman-adv/tp_meter.c net/batman-adv/types.h 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/7715c73f33260af724d734c41b794457e9be8dbc https://git.kernel.org/stable/c/297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae https://git.kernel.org/stable/c/0b1bedf114ea93fef929b31f0d70a9eedcc601de https://git.kernel.org/stable/c/a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0 https://git.kernel.org/stable/c/b285bc0a97f43823a4967fb6d286de4c7f53d541 https://git.kernel.org/stable/c/d078501dde9b57210f1808cdef4b59463d1f5fc8 https://git.kernel.org/stable/c/77098e4bea37af51d3962efa88a5af2ea5e1ac57