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 A917537C91A for ; Sat, 15 Aug 2026 06:29:44 +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=1786775385; cv=none; b=Hx29vSgvKdQ9r1Mf+qFyBHGflAOOJRDbJSsX93BB7B8kpBBl0DnCBttjBDOc6jCOz1ux15H54vfuLP91dwH5EskqibcGtJW05JZ68xO53dFta6VzNJG5VCsTWh1ryXbZj+BSs0g6xx3UcDcYucDacCfs1L6CzHI1Iry4pAqGzyI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786775385; c=relaxed/simple; bh=+kgCqcn76B03AK/WmRSf6KsCaD09eum4iYFADu6UQMQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=L0yd/PQo8/V0xMBYX/C+qLMe+gkymxma7v2nLUnrDZPEuqkdezNzpdbvjfurdbl+/qVZeJWdtUCp4JiDvWkmuTzptLYC3oc+V3SNguXcDl/ZEihPEGwSoWgf1kSXaeaAVRyEwGqpm0fyabWbCr6HYtHN0bHaY3yKzqprArEiBEo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nlSE3i62; 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="nlSE3i62" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA1AC1F000E9; Sat, 15 Aug 2026 06:29:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786775384; bh=cLsj9gg5Uh80L77pkPDohLtUK+bj+AwdwZx/4Xj8tDc=; h=From:To:Cc:Subject:Date:Reply-To; b=nlSE3i62Ak2Z6bauYL8QzjbmcE1NczM+GSqg37TwH9q4TpOMNoJmtjCfKalWh3fRg i5+XptgRrKApubpRL6rhrQPDFKg/9JRb31ITMcGxlczFvMOFzhONZAb2zYG6xwKGhj W1c/oXwq38s0mul+BDVTmhwxjnhIFdxtjPOBK2CU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72468: xprtrdma: Initialize re_id before removal registration Date: Sat, 15 Aug 2026 15:09:07 +0900 Message-ID: <2026081534-CVE-2026-72468-37e1@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=3161; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=pysxeIyodRkeHyZznU1FkQ2IZGIevGM0pG3ymFGEjgg=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDL/C06aYbjV5kVizpeWcENvbhs+L6y/01chICb/I5 i7+sn1qRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEyk2Zxhfv71Xzp5HaX6x1zL ap+c4c+f+rAzm2GeXdY19iPO+Uf/vTibuEojY5OGX85SAA== 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: xprtrdma: Initialize re_id before removal registration rpcrdma_create_id() registers ep->re_rn with the rpcrdma ib_client before returning the new rdma_cm_id to rpcrdma_ep_create(). However rpcrdma_ep_create() currently stores that pointer in ep->re_id only after rpcrdma_create_id() returns. A local administrator can race an NFS/RDMA mount against RDMA device removal. If rpcrdma_remove_one() observes the just-registered notification before rpcrdma_ep_create() assigns ep->re_id, rpcrdma_ep_removal_done() calls trace_xprtrdma_device_removal(NULL). The tracepoint dereferences id->device->name and copies id->route.addr.dst_addr, so the callback can crash the kernel with a NULL pointer dereference. Store the rdma_cm_id in ep->re_id immediately before publishing ep->re_rn. The existing error path still destroys the id directly if registration fails; ep is then freed by the caller without using ep->re_id. Remove the later duplicate assignment in rpcrdma_ep_create(). The Linux kernel CVE team has assigned CVE-2026-72468 to this issue. Affected and fixed versions =========================== Issue introduced in 6.11 with commit 3f4eb9ff923413cdb4c7e171c06d3564f6286712 and fixed in 6.12.97 with commit 51248d877bbc6e604e38aeaf776c2781cb4f0dbd Issue introduced in 6.11 with commit 3f4eb9ff923413cdb4c7e171c06d3564f6286712 and fixed in 6.18.40 with commit 28743571c17b58c21a7216fc9faaf8028df5869b Issue introduced in 6.11 with commit 3f4eb9ff923413cdb4c7e171c06d3564f6286712 and fixed in 7.1.5 with commit 264ccd7871915749bee55fe0c39467a7f08d5479 Issue introduced in 6.11 with commit 3f4eb9ff923413cdb4c7e171c06d3564f6286712 and fixed in 7.2-rc1 with commit bb7caa63e1db22fd03e8dc591b12169e99169dff 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-2026-72468 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/sunrpc/xprtrdma/verbs.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/51248d877bbc6e604e38aeaf776c2781cb4f0dbd https://git.kernel.org/stable/c/28743571c17b58c21a7216fc9faaf8028df5869b https://git.kernel.org/stable/c/264ccd7871915749bee55fe0c39467a7f08d5479 https://git.kernel.org/stable/c/bb7caa63e1db22fd03e8dc591b12169e99169dff