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 AA5BE367B68 for ; Tue, 9 Jun 2026 12:26:28 +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=1781007989; cv=none; b=TfHHscy0hsk0Wak9ZArTt4ageTQjEJIlZMyXpQIwVNLhqlxEZ+WoB+eHaViMF3CB3+iyYRPdn+KD+J1BZNDA7Hw7wMOtNxiNwyw4GVqQ33q0Ie6n0p+vUh/iU0HEehKR3ujEdLLdSFCy/2f/V8VFRGSeZkTuJVpZmcaguD6kkRM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781007989; c=relaxed/simple; bh=EUWLFeCXCg6jO0TyXbZoFfGDnhEKUNHxnL4hHeacUDc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=FcC31Kt9DM5PGCzgjGq/8cdXZ5zp7JYEDU0x2hNuee9B/Buvz/XLowK019rbGce+E6W46Ng0PXhZPbJglqyUSQYS4h18o1H8p3VNpc31lsQOego8qtql1W/NfZ8RM4+Uor1xKKLrMhDL02Uv/0xQJQF5r32OA9/JOTAgVWSuWuk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DMg9xhaq; 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="DMg9xhaq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA0661F00893; Tue, 9 Jun 2026 12:26:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781007988; bh=PEoDlkHgH2xqf4a8Wkd17HEvJYL7oRBBXE9HoPzrfwk=; h=From:To:Cc:Subject:Date:Reply-To; b=DMg9xhaqrzK4bDEU71UfbVANx2yvgbKnIa3eqEIDioFUqc+SLgijimlkLDxexf7xO VgidJN0+lbF7stxHgdN0OcuN3oUDGBIc3WCTLZ2KcfAI+mUinsHbtjkjs7Dor745Ka eaZ0RwsoyrDqWpcHHYf+bOxngc5yXLetCKq0uMHY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-46330: Revert "net/smc: Introduce TCP ULP support" Date: Tue, 9 Jun 2026 14:25:13 +0200 Message-ID: <2026060910-CVE-2026-46330-28d2@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=2423; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=31ZjokHibbb+cp5MYGrHIaX3FJZ50W1K2NHpm3l9UrQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkabGrZezoKAsWfP1S6Z7nJd9vETxMer5p0/0WW2Pp7f j9fLNW72xHLwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATWSzDsOBmyaOU1Te6v610 e/qDKSttaX51WzTDPDXxhiQ5eY6Uvhd25594Mk02O+qgBgA= 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: Revert "net/smc: Introduce TCP ULP support" This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40. As reported by Al Viro, the TCP ULP support for SMC is fundamentally broken. The implementation attempts to convert an active TCP socket into an SMC socket by modifying the underlying `struct file`, dentry, and inode in-place, which violates core VFS invariants that assume these structures are immutable for an open file, creating a risk of use after free errors and general system instability. Given the severity of this design flaw and the fact that cleaner alternatives (e.g., LD_PRELOAD, BPF) exist for legacy application transparency, the correct course of action is to remove this feature entirely. The Linux kernel CVE team has assigned CVE-2026-46330 to this issue. Affected and fixed versions =========================== Issue introduced in 5.17 with commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40 and fixed in 6.19.4 with commit 6c505d95c69e27dbf28fea29dc84d2498d69515c Issue introduced in 5.17 with commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40 and fixed in 7.0 with commit df31a6b0a3057e66994ad6ccf5d95b9b9514f033 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-2026-46330 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/smc/af_smc.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/6c505d95c69e27dbf28fea29dc84d2498d69515c https://git.kernel.org/stable/c/df31a6b0a3057e66994ad6ccf5d95b9b9514f033