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 2A03E49E154 for ; Thu, 24 Sep 2026 16:11:06 +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=1790266267; cv=none; b=l2oajLFLz69QQ28afoTvnvBnlyF2lkLu+gaIU7kD16iUrHe7Ik1nO6arfqvE6Dj891hYgcUDU8DyQWNCLL+AyhR26TK/NlnZ7vA33G5NIAyaK4+l+nRMD1JCAnDHgZyZsB1gUFgearDeLEEIislsOpC/g0my8tu3/pkjLW9IqZU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790266267; c=relaxed/simple; bh=zsKgKMatSOpSKoQ5g59EwMc2zk/44z199zMIMcYCRKc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=toTTSDOTa/Ma9OBbvReboAEuQpc7RR677zZNBr2duCg8O5oS05lmEfvWaBnXsrrGEsRFv65NaR5Y86UmiV7aMrtq+u57eI9u+YE5lyLDloJiagOPDy3picEH+g6kvxnp+z4X+objXOMe7/KztQfuu33NLARf2iBVL1Pu0xbX/T8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pLbY6kGD; 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="pLbY6kGD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E9C9D1F000FF; Thu, 24 Sep 2026 16:11:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790266266; bh=4gTz3w7YIEM+rlXtYpeTUj+BAPG6puNgNy4Sbgwk8aA=; h=From:To:Cc:Subject:Date:Reply-To; b=pLbY6kGDMOQhVcJFJld/XrcmA+1FX7MuHPaQJAuELzirtEJyGQIG2NPOv3F7yWny0 mQu10oNh7FhahCJ93u5OVwkvmy3GXG1MR90IYapGOI2PW/eCF6Gd2lkZhEj14jRRPJ DpXHSIaqXY4d5w3nERM/JQpBUrdvLM9x2NfEnO+I= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-97411: net: ibm: emac: mal: fix potential system hang in mal_remove() Date: Thu, 24 Sep 2026 18:03:11 +0200 Message-ID: <2026092425-CVE-2026-97411-c5d5@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=2397; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=hrZfIOHyouFD7p/OhbYidTXOH5LGF9haDxE29Os1M8Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlbPSd1zpVav+PYW8bWg9G626+1nN/m/Luj3DXKf+nzT U/2/apc2BHLwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATsQ9hWHDG/vmmuOinP2s3 RbovzK3SSgrUl2RYMOns8251B7tr1yz0Cw7dsT7GvOu5JQA= 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: net: ibm: emac: mal: fix potential system hang in mal_remove() napi_disable() is not idempotent and calling it on an already-disabled or unenabled NAPI context will cause the kernel to spin indefinitely waiting for the NAPI_STATE_SCHED bit to clear. In mal_remove(), napi_disable() is called unconditionally. If no MACs were registered, NAPI was never enabled. Also, if they were registered but subsequently unregistered, NAPI was already disabled in mal_unregister_commac(). In either case, calling napi_disable() causes the kernel to hang upon module removal. Fix this by only calling napi_disable() in mal_remove() if the commac list is not empty (which implies NAPI is enabled). The Linux kernel CVE team has assigned CVE-2026-97411 to this issue. Affected and fixed versions =========================== Fixed in 6.12.111 with commit f6c1aad9b35fa083f48ce0c5926204891d82e089 Fixed in 6.18.53 with commit c4cb9a728df66c46067b26263f5beb633aae4087 Fixed in 7.2 with commit 7c5d41f87f079990bf241359e3c1332d8d10fe87 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-2026-97411 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/ibm/emac/mal.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/f6c1aad9b35fa083f48ce0c5926204891d82e089 https://git.kernel.org/stable/c/c4cb9a728df66c46067b26263f5beb633aae4087 https://git.kernel.org/stable/c/7c5d41f87f079990bf241359e3c1332d8d10fe87