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 E4CD7361DC0 for ; Sat, 15 Aug 2026 06:17:56 +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=1786774678; cv=none; b=Z39FvD3YJ/FGSmt4zDxd2GWQ82XoPkgz+wM2F5HndmaR7s7t1NKjRiRwvWrDLoyuH/i1I34KRNbHVmUZXvBkjbg7fGgF/6ZpkYZy+BdInA0LudiLGt20KWmSJdACUjCZIkU400KVOkr5tlwJBNel8cYSjEjUPaJWKvtZiRnY9dA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774678; c=relaxed/simple; bh=oQiyrzAIfFcO+8Cwhn1AyHlkPfpYwkCk13yUyWHEVIY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=o33Adzpv8qDxCD7kvzKy4auZv2nUemVhUsxcH1klZhK5NYrLMgKjGO7tvE/ao0Fpto6Q8TmY19OUxdFNlfZNmGPNHfh3/Db5ZbDoz6EJa0c8mOPs92uN2v5lc/tV0wzb8vk5Oct1ArQtnts355Lxhxq0at51xGQCNIMCkjxfsMM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Llh40xqZ; 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="Llh40xqZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4681B1F000E9; Sat, 15 Aug 2026 06:17:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774676; bh=AphIyBRa5jSn1KwMHzMhKvonRvMazmcfrihu80dOXk0=; h=From:To:Cc:Subject:Date:Reply-To; b=Llh40xqZSKfg3Lk2pPOLLSRSurh9zDmVuKjzGtqy+YJsX+18UfluTyJXPDhzpQ9NW 0XqkDao0W8eR99+wwyUdm+1lQdUoZImXRN0luIRC/pTpkPKf4b2gw5FVcV7iu8X4qq SzhWC/pS8W0OwgjZTzKPTU4+w5fufYc82xb6qGnE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72236: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init() Date: Sat, 15 Aug 2026 15:05:15 +0900 Message-ID: <2026081550-CVE-2026-72236-5d4f@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=2700; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=LDWaINft6XaLF+XfFSfEIqCSJsw4xyml79n+S9HMQtg=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDOcO+901SDsndnbT8TtLKmrdFNft785pn6aTe2Ym2 225krxpHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRaD2GOXyanKl323WqGIx8 G97EPrylqLavgWHBud4bC/6zPj/wdqfLt3edM8y65N5yAQA= 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: s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init() ev variable is userspace controlled via event->attr.config and used as an array index after bounds checking, but without speculation barriers. Add the missing array_index_nospec() call to prevent speculative execution. The Linux kernel CVE team has assigned CVE-2026-72236 to this issue. Affected and fixed versions =========================== Issue introduced in 3.4 with commit 212188a596d17d519842ef2173150315735b54e1 and fixed in 6.6.145 with commit 27206bb57c47bdbe33bccc78fa7f7e2a719a06b9 Issue introduced in 3.4 with commit 212188a596d17d519842ef2173150315735b54e1 and fixed in 6.12.97 with commit a21f3615c88421df81060b6ff89220fd34094c4d Issue introduced in 3.4 with commit 212188a596d17d519842ef2173150315735b54e1 and fixed in 6.18.40 with commit fa1ebae4206e6afc8caa642e9eb1bbe39a9a724f Issue introduced in 3.4 with commit 212188a596d17d519842ef2173150315735b54e1 and fixed in 7.1.5 with commit f79dff8c721bbb1f3fc312ea55e0551c2cc28801 Issue introduced in 3.4 with commit 212188a596d17d519842ef2173150315735b54e1 and fixed in 7.2-rc4 with commit 49145bce539117db4b6e9e83c0e5ef528e361050 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-2026-72236 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: arch/s390/kernel/perf_cpum_cf.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/27206bb57c47bdbe33bccc78fa7f7e2a719a06b9 https://git.kernel.org/stable/c/a21f3615c88421df81060b6ff89220fd34094c4d https://git.kernel.org/stable/c/fa1ebae4206e6afc8caa642e9eb1bbe39a9a724f https://git.kernel.org/stable/c/f79dff8c721bbb1f3fc312ea55e0551c2cc28801 https://git.kernel.org/stable/c/49145bce539117db4b6e9e83c0e5ef528e361050