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 30AF04DEC30 for ; Thu, 17 Sep 2026 16:14:52 +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=1789661693; cv=none; b=QzkrEj0IcSj8HuWjzzLN2wtNdLEE2fxgYjWSi2l75xFbBSEG8PHTuJyryh33VnpZCZnmaNUsGPylIiECuYqi0MhX6YXle0ZpAkduNWueTvXqs5ucl0/K6+NgjL13gea03bdRJBAn9jejK/CPHaNlqURhiGIeNjcjbG9AccFTT3Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789661693; c=relaxed/simple; bh=B0tAK4pFV3M4xnN3Kgew7pSH7pwnbuF+bHpGNikbwgI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=AAGIbjaXqcleHZiYN/8IQcvqtyZWf4UzCy/X1kPt234zlT8hY+Yk+decZ5ixr3Ck9Q3DnFZQ1vFENAwtZ4wMjp8Jjf3YOaOAF0231x1ZJCKR7rmhnHFXbLlzEG54TooSwtpaI/Xri7pwUefmLDS/ajqZJ2FeGFm9t+1sEhD9hdE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NCkdkhNQ; 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="NCkdkhNQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1512E1F00898; Thu, 17 Sep 2026 16:14:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789661690; bh=TyVZnh5Kup98RRS8edmU2RpFUEDM16LRp7E3LJD8lgo=; h=From:To:Cc:Subject:Date:Reply-To; b=NCkdkhNQY9A6tXSc26Er8PTvQV4YcM22Rr+JfwNObbwyxeXzHs0Li2FPEmcQzziq8 luJecAtQnc9o2DbKHDembW21ailJZTo1Pu2gFV4TUJ+CnHpMN7TUtYUZ7+QquDxvlj Cyay/Uked9k11DNsYIdAKttZPRFL/aTbjOPspUFs= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-90104: NFSv4.1: zero referring call lists before decoding Date: Thu, 17 Sep 2026 17:08:54 +0100 Message-ID: <2026091714-CVE-2026-90104-e4f2@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=2260; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=cKHIdS+EopK+QjYY0pdfn+e/cqKV5loAFblKUAiBII0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBPJmNzCqROR+Ne+eE+wUfLtE4YnnFSN/XtOY+V1OQ ZvnnuDqiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgInMOcCwYKfmD6O/d48s1RVr 9nk0fcLS13FTVjEsaJrFe4Ah+L8V48agfwEN9nmWj59dAgA= 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: NFSv4.1: zero referring call lists before decoding decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree(). Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists. The Linux kernel CVE team has assigned CVE-2026-90104 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.31 with commit 4aece6a19cf7f474f15eb861ba74db4479884ce3 and fixed in 7.2.6 with commit f31f3c042e024aef437cda42f0424ae8d4594b6c Issue introduced in 2.6.31 with commit 4aece6a19cf7f474f15eb861ba74db4479884ce3 and fixed in 7.3-rc1 with commit 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc 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-2026-90104 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: fs/nfs/callback_xdr.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/f31f3c042e024aef437cda42f0424ae8d4594b6c https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc