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 7E8763B4E83 for ; Thu, 17 Sep 2026 16:16:48 +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=1789661809; cv=none; b=gZVo/V9mBdtAXusStM81diif0spokRYNfPFci9xDRIxllVxHovC6+q8VAE1qqhJqBMGIS4ttPIJ/ULTfyx2bPcoP5C6RlaKuZ3FlBvUGO8BNSAa/6m/GIJA20i/8Cdjs1sl1Lv9vmeVeufGUJtcYttbN4hmbLEHMxbNgoCJvATQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789661809; c=relaxed/simple; bh=gak6eflju7SRHPsbxpWY/JtMmA8Yu2bhVADs8IL9uN4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=A9HLJWCEVHPVV+NBztEzWdOoJEaW6JAWkzlOVIWCVIHr4Y6riFDoLD9jIgh2L3CNI3Im0XFOpNEm8VhehjuHQyUp45NTDanZfEMK2oOB+hdHTyGhFnuD2LdvX1kEJ2BU9Cqthb9YMta2S0EUdk8ljIAy6ZNcoKvm4KYMf1KltxE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nXjYv4W9; 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="nXjYv4W9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95C9F1F000FF; Thu, 17 Sep 2026 16:16:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789661808; bh=eBmFx9u4nthbhlqNB53oeBArCohLqrbKBVbcmU5BTlw=; h=From:To:Cc:Subject:Date:Reply-To; b=nXjYv4W9a69j2DUtt4ueko/c09va3xS+Sq3VvRRFZ52DzooS3jFOsjJmTUl7NlBiz wGkucrvFFjgWCjg9AuTdfLUt0LKT+SCqpSAYBISLNLX6eD+AjYkISVJd18x6FI0k0a 7SdcvMkSe/DFX3vvSaEYX+E/zRA4Seoqf+VCpRe0= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-90143: net: kcm: Hold RCU read lock while running BPF parser Date: Thu, 17 Sep 2026 17:09:33 +0100 Message-ID: <2026091722-CVE-2026-90143-bec2@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=3452; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=qqPWn5/Fctjs05ACmWD7mrFjN+MFPjtwyjHFYZcpdvA=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBMomLd+xNryt/QdjcY/sg4/rQ5atZ8ltmPCDJy9b5 bBwzIztHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjAR9QaGWcwSn8xeMgqF2ZVd 8rnw8NHprnxNe4Z5au/CmKVeSFvbnefzmLw6VaZJ6V0YAA== 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: kcm: Hold RCU read lock while running BPF parser kcm_parse_func_strparser() calls bpf_prog_run_pin_on_cpu() which prevents CPU migration, but does not establish an RCU read-side critical section. Consequently, BPF map operations can trigger WARN_ON_ONCE(!bpf_rcu_lock_held()) when called from the KCM strparser program. Hold the RCU read lock while running the program. The Linux kernel CVE team has assigned CVE-2026-90143 to this issue. Affected and fixed versions =========================== Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 5.10.270 with commit 37108861cf7bd909d4a372069bcd61c8f489e232 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 5.15.221 with commit 3c70d27e792a28bca650ddd8a9aa0fe3591ffec5 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 6.1.188 with commit 1d26a6e007d46babc7fa76e5a157dccf86cd55c0 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 6.6.157 with commit b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 6.12.110 with commit 21526f8a191a3c50622b8c10bd927870d780eae4 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 6.18.52 with commit 292846223eaddba890e40699d2ab82ee5671798c Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 7.2.6 with commit f392affef3c9ce64dfdde794df0579e0a7793440 Issue introduced in 4.9 with commit 9b73896a81dc68a638a011877b7344b252f92276 and fixed in 7.3-rc1 with commit b0346dd64e4905291cc9c479f2e6cf1884ced4e6 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-2026-90143 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: net/kcm/kcmsock.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/37108861cf7bd909d4a372069bcd61c8f489e232 https://git.kernel.org/stable/c/3c70d27e792a28bca650ddd8a9aa0fe3591ffec5 https://git.kernel.org/stable/c/1d26a6e007d46babc7fa76e5a157dccf86cd55c0 https://git.kernel.org/stable/c/b0e94ea63dbdcbfec9beb819cd5f8fa584809ef2 https://git.kernel.org/stable/c/21526f8a191a3c50622b8c10bd927870d780eae4 https://git.kernel.org/stable/c/292846223eaddba890e40699d2ab82ee5671798c https://git.kernel.org/stable/c/f392affef3c9ce64dfdde794df0579e0a7793440 https://git.kernel.org/stable/c/b0346dd64e4905291cc9c479f2e6cf1884ced4e6