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 35A534F96AA for ; Thu, 17 Sep 2026 16:21:08 +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=1789662069; cv=none; b=IUUxKMuPgJbLsbH8VotOAEPF3m4q/PplrtlYGAmbnkEVA8XZahGGYVofUsCTkzjDci+tMIIZPKkhJwFHNoczIg5aH3XMxOkCUTVjYcIfcKSNQsHi0BvuoEhM1ANUzhbuVw9igXletbymPTSk9d5it80HZvvS2Pz899e52fM67Ug= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789662069; c=relaxed/simple; bh=xnaK4eCtNtWwz7MXTUbaEAxh0I63y9NFPSzwiX7BJ/Y=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=E7SQJo/GcGPhBfnOhEyAJTO6OdFIsqmphD4s+6lYE4YIfzrid8dMrsAjW/ImXAzzbAAKJQjjm+JI3wW8IrfhnhXkI6ASyb2lWu398zKPAsDUq58Vi6EPJITEogfIQG36ALzD3prEXyFgkeOkg1hb9d7SbhDn1coBkGvyp2wvaWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UYx/jCCQ; 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="UYx/jCCQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A3F11F000FF; Thu, 17 Sep 2026 16:21:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789662068; bh=Amv+0TuG+Zkb7E7BMKC+s10UWBg4cLZnWNobFVPfalQ=; h=From:To:Cc:Subject:Date:Reply-To; b=UYx/jCCQDYc/AfKDd7vHOxMEXWgxVyqSOoyhnaTj2cgwCuja0etLLWhuklcTpkoQk mi0pC46Doz707PmY2LUIljYhKCEwVtoQaFQ6YFOhr0T+/rbukrpchavNwUUIwDsIAn nXNm7IUc8fWGZt9LBUlx44ezmQA8yujAnbPFh51Q= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-90230: nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() Date: Thu, 17 Sep 2026 17:11:00 +0100 Message-ID: <2026091740-CVE-2026-90230-12fc@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=3479; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=2FsnzG/pnRJouiLnbw0u1HvNVq84ujMo9Cb2A7FPmvw=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBDpqil7sSnFQbMlkU7z8J+Wf1dnpq1leBdc7HVUL0 hY5s6irI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACbypp5hnvmH0h0pb+ZvmMJ4 ZqPo/IaZ8878cmOYH7LT6bNFyjOG5bbszGvWGj6am8d9CQA= 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: nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() nvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with the host-supplied transfer length (tl) and hands it to nvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate() then reads the negotiate header and, for each of the halen hash identifiers and dhlen DH group identifiers, indexes into the fixed idlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]). Neither the transfer length nor halen/dhlen is validated. A malicious or non-conformant host can report a tl smaller than the negotiate structure, or a halen/dhlen larger than the array (both are u8, up to 255), making the loops read past the end of the allocated buffer (heap out-of-bounds read). The sibling nvmet_auth_reply() already validates tl against the structure size; the negotiate path did not. Pass tl into nvmet_auth_negotiate(), reject a tl that does not cover the negotiate data plus one full protocol descriptor, and reject halen/dhlen larger than NVME_AUTH_DHCHAP_MAX_DH_IDS. The Linux kernel CVE team has assigned CVE-2026-90230 to this issue. Affected and fixed versions =========================== Issue introduced in 6.0 with commit db1312dd95488b5e6ff362ff66fcf953a46b1821 and fixed in 6.6.157 with commit 89ff11b72f38976f3b5aea23a5228ee05e277209 Issue introduced in 6.0 with commit db1312dd95488b5e6ff362ff66fcf953a46b1821 and fixed in 6.12.110 with commit aaac783950b17c57df9b6f7344747cacb1a407ed Issue introduced in 6.0 with commit db1312dd95488b5e6ff362ff66fcf953a46b1821 and fixed in 6.18.52 with commit c38a8186326799957d293d370136c128cd113916 Issue introduced in 6.0 with commit db1312dd95488b5e6ff362ff66fcf953a46b1821 and fixed in 7.2.6 with commit 7b81e4d2230e3d2d372c826180c4ef0efc244f31 Issue introduced in 6.0 with commit db1312dd95488b5e6ff362ff66fcf953a46b1821 and fixed in 7.3-rc1 with commit 5bb96cc218835769ab74ec7f3ea2bf81fbffe955 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-2026-90230 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/nvme/target/fabrics-cmd-auth.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/89ff11b72f38976f3b5aea23a5228ee05e277209 https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916 https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31 https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955