[{"id":3673719,"web_url":"http://patchwork.ozlabs.org/comment/3673719/","msgid":"<20260406122701.zjg4ehpzqy5kj4m2@wintermute.fritz.box>","list_archive_url":null,"date":"2026-04-06T12:27:01","subject":"ACK: [SRU][Q/N/J][PATCH 0/3] CVE-2026-23112","submitter":{"id":86131,"url":"http://patchwork.ozlabs.org/api/people/86131/","name":"Manuel Diewald","email":"manuel.diewald@canonical.com"},"content":"On Mon, Apr 06, 2026 at 01:51:15PM +0300, Cengiz Can wrote:\n> https://ubuntu.com/security/CVE-2026-23112\n> \n> [ Impact ]\n> \n> nvmet_tcp_build_pdu_iovec() can walk past cmd->req.sg when a PDU length\n> or offset exceeds sg_cnt, then use bogus sg->length/offset values leading\n> to _copy_to_iter() GPF/KASAN. An attacker with access to the NVMe-TCP\n> target interface could trigger a kernel crash.\n> \n> \n> [ Fix ]\n> \n> Cherry-picked from mainline for questing and noble. Adjusted for jammy\n> due to older iovec style.\n> \n> \n> [ Test Plan ]\n> \n> All three kernels were compile-tested and boot-tested. PoC verification\n> confirmed the vulnerability is no longer triggerable after the fix.\n> \n> \n> [ Where Problems Could Occur ]\n> \n> If the bounds checks are incorrect, NVMe-TCP connections could be\n> prematurely terminated or the target could become unresponsive. In the\n> worst case, a malformed check could still allow out-of-bounds access.\n> \n> \n> \n> -- \n> kernel-team mailing list\n> kernel-team@lists.ubuntu.com\n> https://lists.ubuntu.com/mailman/listinfo/kernel-team\n\nAcked-by: Manuel Diewald ","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=ZGCezOV4;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fq7rB5c7sz1yFt\n\tfor ; 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boundary=\"===============1970045780550770939==\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "}},{"id":3675073,"web_url":"http://patchwork.ozlabs.org/comment/3675073/","msgid":"","list_archive_url":null,"date":"2026-04-09T04:52:20","subject":"ACK: [SRU][Q/N/J][PATCH 0/3] CVE-2026-23112","submitter":{"id":85372,"url":"http://patchwork.ozlabs.org/api/people/85372/","name":"Masahiro Yamada","email":"masahiro.yamada@canonical.com"},"content":"On 4/6/26 19:51, Cengiz Can wrote:\n> https://ubuntu.com/security/CVE-2026-23112\n>\n> [ Impact ]\n>\n> nvmet_tcp_build_pdu_iovec() can walk past cmd->req.sg when a PDU length\n> or offset exceeds sg_cnt, then use bogus sg->length/offset values leading\n> to _copy_to_iter() GPF/KASAN. An attacker with access to the NVMe-TCP\n> target interface could trigger a kernel crash.\n>\n>\n> [ Fix ]\n>\n> Cherry-picked from mainline for questing and noble. Adjusted for jammy\n> due to older iovec style.\n>\n>\n> [ Test Plan ]\n>\n> All three kernels were compile-tested and boot-tested. PoC verification\n> confirmed the vulnerability is no longer triggerable after the fix.\n>\n>\n> [ Where Problems Could Occur ]\n>\n> If the bounds checks are incorrect, NVMe-TCP connections could be\n> prematurely terminated or the target could become unresponsive. In the\n> worst case, a malformed check could still allow out-of-bounds access.\n>\n>\n>\nAcked-by: Masahiro Yamada ","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=SjZ+EY3s;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4frncD5Ntzz1yD3\n\tfor ; Thu, 09 Apr 2026 14:52:43 +1000 (AEST)","from localhost ([127.0.0.1] helo=lists.ubuntu.com)\n\tby lists.ubuntu.com with esmtp (Exim 4.86_2)\n\t(envelope-from )\n\tid 1wAhNT-0001C8-3z; 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charset=\"utf-8\"; Format=\"flowed\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "}},{"id":3675906,"web_url":"http://patchwork.ozlabs.org/comment/3675906/","msgid":"<87tstisx34.fsf@gmail.com>","list_archive_url":null,"date":"2026-04-10T14:34:39","subject":"APPLIED: [SRU][Q/N/J][PATCH 0/3] CVE-2026-23112","submitter":{"id":89305,"url":"http://patchwork.ozlabs.org/api/people/89305/","name":"Mehmet Basaran","email":"mehmet.basaran@canonical.com"},"content":"Applied to questing:linux, noble:linux, jammy:linux master-next\nbranches. Thanks.\nCengiz Can writes:\n\n> https://ubuntu.com/security/CVE-2026-23112\n>\n> [ Impact ]\n>\n> nvmet_tcp_build_pdu_iovec() can walk past cmd->req.sg when a PDU length\n> or offset exceeds sg_cnt, then use bogus sg->length/offset values leading\n> to _copy_to_iter() GPF/KASAN. An attacker with access to the NVMe-TCP\n> target interface could trigger a kernel crash.\n>\n>\n> [ Fix ]\n>\n> Cherry-picked from mainline for questing and noble. Adjusted for jammy\n> due to older iovec style.\n>\n>\n> [ Test Plan ]\n>\n> All three kernels were compile-tested and boot-tested. PoC verification\n> confirmed the vulnerability is no longer triggerable after the fix.\n>\n>\n> [ Where Problems Could Occur ]\n>\n> If the bounds checks are incorrect, NVMe-TCP connections could be\n> prematurely terminated or the target could become unresponsive. In the\n> worst case, a malformed check could still allow out-of-bounds access.\n>\n>\n>\n> -- \n> kernel-team mailing list\n> kernel-team@lists.ubuntu.com\n> https://lists.ubuntu.com/mailman/listinfo/kernel-team","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=HYe9ogOn;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fsfTT69hZz1y2d\n\tfor ; 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