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 530A53358D6 for ; Fri, 8 May 2026 14:26:06 +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=1778250367; cv=none; b=jCLpBF8vd+rAZpM/7B1lyn5T7m7hseZ2bGgR0BfI1/m24jdb169WM+e/R4StgOrAWUpckGeQO/2v0HF7dTAxxbzifVUw2GHKjJHrqw3oDSJIzY/mNRgbq5geY+8+unSVl8gL+Xhi3q0wpksU5fNcizzZx51UjYUo0PvuJmagKmc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250367; c=relaxed/simple; bh=gb0CP/LtpYBl5tvYB1wYHnS46jBzsDou6p/YewreZRg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=H52oZ7ivYSGSUTSQ78CLKcIu0HXS3ONLMBX1XcI/NXFdIsQkYO9HloRBBCSVOO6Xvh+pG3Y68nwixxy12H5/IFOOhVStFVHv/f8Oi/mnlHa0umgVB4YbaduYnONgjAl0NAF0DoFS5d0PSJ9tRDL0g5QQcYEHyJA/ppgWNwCfFfA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ns1ENqQY; 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="ns1ENqQY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 373B7C2BCB0; Fri, 8 May 2026 14:26:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250366; bh=gb0CP/LtpYBl5tvYB1wYHnS46jBzsDou6p/YewreZRg=; h=From:To:Cc:Subject:Date:Reply-To:From; b=ns1ENqQYd54cYjnDooo5tjxZ62tjZyopGaYsHA8izynbcTOzCLKWOVCZtY/pm/vEg jo/blxEt3Jpncckhn2QlVv/kDyZJV2F5+9yy0JyYXuVi5bTAnaPE8XpZUo8pzgHDPa ilqU5T4NIhdIN3rQJHTS8AHn3q7Rh0xfBnmwAt28= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43447: iavf: fix PTP use-after-free during reset Date: Fri, 8 May 2026 16:22:56 +0200 Message-ID: <2026050856-CVE-2026-43447-5a2b@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=2625; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=vDnrbrW597qPJbFpOCQEsX33vXdmhCAXRtTaWsRnZwg=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P7bcnKeYzjr9z4EdTXvbynIspupwTr6xL93iauklZ qn+iKUXO2JZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAiU/YxLLi0TsnA0feX5FKP KUa/7K4zNjLp7GRYMKO2oHRi8wH+b3w7fYSuCVzkXdlkCgA= 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: iavf: fix PTP use-after-free during reset Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a worker to cache PHC time, but failed to stop it during reset or disable. This creates a race condition where `iavf_reset_task()` or `iavf_disable_vf()` free adapter resources (AQ) while the worker is still running. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it accesses freed memory/locks, leading to a crash. Fix this by calling `iavf_ptp_release()` before tearing down the adapter. This ensures `ptp_clock_unregister()` synchronously cancels the worker and cleans up the chardev before the backing resources are destroyed. The Linux kernel CVE team has assigned CVE-2026-43447 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 and fixed in 6.18.19 with commit 1b034f2429ce6b45ce74dc266175d277acafc5c4 Issue introduced in 6.15 with commit 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 and fixed in 6.19.9 with commit 90cc8b2add29b57288025b51c70bc647e7cccb12 Issue introduced in 6.15 with commit 7c01dbfc8a1c5f8b8e4a7907ab06db1449d478d0 and fixed in 7.0 with commit efc54fb13d79117a825fef17364315a58682c7ec 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-2026-43447 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/net/ethernet/intel/iavf/iavf_main.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/1b034f2429ce6b45ce74dc266175d277acafc5c4 https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12 https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec