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 026993EF0A5 for ; Fri, 8 May 2026 14:25:31 +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=1778250331; cv=none; b=q8tNEZOZRFNTCpps9xigegyidvyYoyNtNz+A8jTUM0qf7ywbH3nON1eSLrW06llkMvI22XJvg1w066ak9QwJWj0iZbnlBH2Z/07fa2Ytb9Yz5BCgznypPtlHxrXtFjmp1GPmmGyYk4fUfYLjbT2Esj6Z84b6jt5f/xBBJyqjXtw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250331; c=relaxed/simple; bh=DZkQm5vJz/v8ybYz9jTWo55VZQxXPuqKB7hi/NEO77o=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Co1FmV4UzmcpecvwiSwJr+qUjGpS5vb5jF9dz8U04lpOaSEbcH2vFGuacOtRu1QwJbuffjZz0IM5Wf/7GMY49ar/lI4UFHWU9nEpbUclvRHUgnHFGUpDYPHuJhrp/aKF5L8Lt1m+z2gyEly0Wbq1NNNVwlGbaTMfg3707cpCp0w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=J+8lT9xP; 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="J+8lT9xP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C52CC2BCB0; Fri, 8 May 2026 14:25:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250330; bh=DZkQm5vJz/v8ybYz9jTWo55VZQxXPuqKB7hi/NEO77o=; h=From:To:Cc:Subject:Date:Reply-To:From; b=J+8lT9xP7QORZYTQTpZhqEXBT1QheBkFNDG5ahYQDnuke0wQD7LDvBLJBG4EoWMjf 55V90KX4tad86e1is/nzZV4o1ql+5lTXV8V3/ktPsHd+7c/ZOnlZqKxRHKyD29imV3 Hin4SHo6y3c/B7Ny47acrly/kTJzvrdXG5/5gs+A= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43435: rust_binder: fix oneway spam detection Date: Fri, 8 May 2026 16:22:44 +0200 Message-ID: <2026050852-CVE-2026-43435-9f8d@gregkh> X-Mailer: git-send-email 2.54.0 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=2722; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=uKfNKrwi4q8lmLGzfAEsJWBmqvK9K/tiyTn+PGgsa9Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/PzY0vzfntzzfK7PRTeiBzu+rK6+VKd/y+bR+Q8RF2 +q5rZ/2dcSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBE3vIzLOiWZGXtbknJN7hz QaVOl/9p5bo5xgzzCxNTfl69Ur904s5jja/3Bk8McY7dAgA= 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: rust_binder: fix oneway spam detection The spam detection logic in TreeRange was executed before the current request was inserted into the tree. So the new request was not being factored in the spam calculation. Fix this by moving the logic after the new range has been inserted. Also, the detection logic for ArrayRange was missing altogether which meant large spamming transactions could get away without being detected. Fix this by implementing an equivalent low_oneway_space() in ArrayRange. Note that I looked into centralizing this logic in RangeAllocator but iterating through 'state' and 'size' got a bit too complicated (for me) and I abandoned this effort. The Linux kernel CVE team has assigned CVE-2026-43435 to this issue. Affected and fixed versions =========================== Issue introduced in 6.18 with commit eafedbc7c050c44744fbdf80bdf3315e860b7513 and fixed in 6.18.19 with commit edf685946c4acbe57cb96f8d5f3c07e9a2e973c8 Issue introduced in 6.18 with commit eafedbc7c050c44744fbdf80bdf3315e860b7513 and fixed in 6.19.9 with commit 8d34c993a9a156e657e43cb95186980745cc3597 Issue introduced in 6.18 with commit eafedbc7c050c44744fbdf80bdf3315e860b7513 and fixed in 7.0 with commit 4fc87c240b8f30e22b7ebaae29d57105589e1c0b 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-2026-43435 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/android/binder/range_alloc/array.rs drivers/android/binder/range_alloc/mod.rs drivers/android/binder/range_alloc/tree.rs 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/edf685946c4acbe57cb96f8d5f3c07e9a2e973c8 https://git.kernel.org/stable/c/8d34c993a9a156e657e43cb95186980745cc3597 https://git.kernel.org/stable/c/4fc87c240b8f30e22b7ebaae29d57105589e1c0b