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 49CB43E5569 for ; Fri, 8 May 2026 14:27:00 +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=1778250420; cv=none; b=PCUUtW4uBV9T8FK2Um/1F6PMLlJDQhgDT1ud8kbOCBlspq7f33QXvAAXGnpkAY9jXUgrzhQYhhW7IBNpYqeYCVqyx1uYHmxIl5yjcEeU6UV6PKrJ9oNY24q+yO+8mzGOkM7cuYJF1j27sv/Ad6p0iYrUuIWE9romd+T/Vq8izP0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250420; c=relaxed/simple; bh=19cLjdpQF3+njGmxjKOANCsoldtmOTIqgv1b1WxCzzw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lcR1AsUArguqljM0HidF64k1sbTHOQkLFVVEt6OS59zqQpe+IZzMW8rxSICcymUYTnsmWHE+Z1ET2tDR5S+TMS8rnr9IjKNgIicfqgKAyR6RSO6jz4IAErEfDbBgLuv3IhQQd44jFATgp6Onj+lyEBcgWQH0IuZ2Mx+94bamqhQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VZPHq9qv; 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="VZPHq9qv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A000DC2BCB0; Fri, 8 May 2026 14:26:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250420; bh=19cLjdpQF3+njGmxjKOANCsoldtmOTIqgv1b1WxCzzw=; h=From:To:Cc:Subject:Date:Reply-To:From; b=VZPHq9qv+bwkqcn+woPThQvV1Q5pTLLIoqpaXe4x3PfnxhR/qYSe+JSEcJZEzpNMj 3wxL9L0cyIeAtbEz2IrdW00avDHh0ta3kVcGe6QS4CckrWETBlApyaGK+h0q3mvGXa /hg34jVlVAPjC26sSemRc98jwIjWNW20YG3FqB04= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43469: xprtrdma: Decrement re_receiving on the early exit paths Date: Fri, 8 May 2026 16:23:18 +0200 Message-ID: <2026050804-CVE-2026-43469-3846@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=4366; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=h7OGCBhnm68PfgRBH8QVdyGZAtzgHez56ENQqKE2dpQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P/bIcvcbHVWLPzzxHkMNey6bbfWPM2eP7PfztLkpz LN8xrkzHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCR69YM84umcy+MTAso9Z6Y 2ZB9/NXlB3UqQgxzhZVDEheJnZVTkJ554hzH8iUxFkZvAA== 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: Decrement re_receiving on the early exit paths In the event that rpcrdma_post_recvs() fails to create a work request (due to memory allocation failure, say) or otherwise exits early, we should decrement ep->re_receiving before returning. Otherwise we will hang in rpcrdma_xprt_drain() as re_receiving will never reach zero and the completion will never be triggered. On a system with high memory pressure, this can appear as the following hung task: INFO: task kworker/u385:17:8393 blocked for more than 122 seconds. Tainted: G S E 6.19.0 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u385:17 state:D stack:0 pid:8393 tgid:8393 ppid:2 task_flags:0x4248060 flags:0x00080000 Workqueue: xprtiod xprt_autoclose [sunrpc] Call Trace: __schedule+0x48b/0x18b0 ? ib_post_send_mad+0x247/0xae0 [ib_core] schedule+0x27/0xf0 schedule_timeout+0x104/0x110 __wait_for_common+0x98/0x180 ? __pfx_schedule_timeout+0x10/0x10 wait_for_completion+0x24/0x40 rpcrdma_xprt_disconnect+0x444/0x460 [rpcrdma] xprt_rdma_close+0x12/0x40 [rpcrdma] xprt_autoclose+0x5f/0x120 [sunrpc] process_one_work+0x191/0x3e0 worker_thread+0x2e3/0x420 ? __pfx_worker_thread+0x10/0x10 kthread+0x10d/0x230 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x273/0x2b0 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 The Linux kernel CVE team has assigned CVE-2026-43469 to this issue. Affected and fixed versions =========================== Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 5.15.203 with commit 7ea69259a60a364f56cf4aa9e2eafb588d1c762b Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 6.1.167 with commit 8cb6b5d8296b1f99a8d36849901ebabfe3f749db Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 6.6.130 with commit 74c39a47856bddcde7874f2196a00143b5cd0af9 Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 6.12.78 with commit 49f53ee4e25297d886f14e31f355ad1c2735ddfb Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 6.18.19 with commit 8127b5fec04757c2a41ed65bca0b3266968efd3b Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 6.19.9 with commit dc3ebd7e2d73dbd4d317785735ffa6c4a6384ddf Issue introduced in 5.13 with commit 15788d1d1077ebe029c48842c738876516d85076 and fixed in 7.0 with commit 7b6275c80a0c81c5f8943272292dfe67730ce849 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-2026-43469 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/7ea69259a60a364f56cf4aa9e2eafb588d1c762b https://git.kernel.org/stable/c/8cb6b5d8296b1f99a8d36849901ebabfe3f749db https://git.kernel.org/stable/c/74c39a47856bddcde7874f2196a00143b5cd0af9 https://git.kernel.org/stable/c/49f53ee4e25297d886f14e31f355ad1c2735ddfb https://git.kernel.org/stable/c/8127b5fec04757c2a41ed65bca0b3266968efd3b https://git.kernel.org/stable/c/dc3ebd7e2d73dbd4d317785735ffa6c4a6384ddf https://git.kernel.org/stable/c/7b6275c80a0c81c5f8943272292dfe67730ce849