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 4CA743594A for ; Sun, 18 Oct 2026 15:54:59 +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=1792338900; cv=none; b=tWcB5WV3YMeVAFKVDTQG2G99TAaBF54arp++FW9VpqN3uXR0pU9C7fTNbBES7pf2p9gi9jxwGdZs9zh/wzLsxcqfxHxZEoNjLNwBnsL8Zvg3G8ujKaC6exZqxL5YizG6Z6DOOdO1qO/13R/53y8w/omctrHYhKFjfCl+zEhDOgw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792338900; c=relaxed/simple; bh=+R9OctmMIu3X/uYf7m4fecLXBENGYNMaNPjoqJNRMnA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=fUjsQQVYFoLxSx2mZqeFEhb/xLGk8b9YgCi4uMRJ6a+tzFMExbNmBbXzzCz4EkT3EpXlBTse+lpEwyn1ZtJsHJtJVUVowqj0HX3X9vs2uEvnd3qsr2cn9Y2Oh38vzlQDO68WM/NZzPsGMUcepxf2rFTHm6gepAH5ECm8ZkcdDF0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uxbWzcQE; 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="uxbWzcQE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8340D1F000C4; Sun, 18 Oct 2026 15:54:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792338899; bh=CpG1EhtBaJedHg31xmPHoNNtztA2g9ydxGjfSiXn+wU=; h=From:To:Cc:Subject:Date:Reply-To; b=uxbWzcQEQ+YtvMZDYP7YZBmrq7E3GREzT2emT/1M+PPJ+7+ojwoRmkcmCHdkRKQ7P j3Fzpy5vhwYWal02l674LDVWVuTfyHJOaLYEEYlAY71GTK5CighDEoovhShYwixbwI JAMp4tCBImFh+E6uQDeA6iUXwMJj1R4U5FkYsNo4= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98729: x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h Date: Sun, 18 Oct 2026 17:45:04 +0200 Message-ID: <2026101810-CVE-2026-98729-e722@gregkh> X-Mailer: git-send-email 2.56.0 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=2451; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=eFR54bKZgnu4IXmiWagdnI80iYJFv/DTYEMzOm/3mo0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXXnqffBU+b2/e4nCWWPfD8Yf13nhGTJn7zvbACT/tx b+vrw+Y2BHDwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATsTzCMGMOl1rnhSJJcUUP vucumru+s1pMY1iwXuxCRudzs+9Col73KkzYjG9s/ccOAA== 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: x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h get_align_mask() returns huge_page_mask_align() for hugetlbfs, but get_align_bits() adds va_align.bits regardless, so vm_unmapped_area() returns an address off the huge page boundary and __unmap_hugepage_range() hits BUG_ON(start & ~huge_page_mask(h)) at teardown. This can be triggered on Carrizo and FX-8370E, both hstates. Pass the file to get_align_bits() and skip the randomisation for hugetlbfs. [ bp: Massage commit message. ] The Linux kernel CVE team has assigned CVE-2026-98729 to this issue. Affected and fixed versions =========================== Issue introduced in 6.13 with commit 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 and fixed in 6.18.56 with commit fe23680e6f1d52b8cc45d77bf7c54249508a81c7 Issue introduced in 6.13 with commit 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 and fixed in 7.2.10 with commit b46b2e2de47ca9449532b0a7110ed99f79061d6e Issue introduced in 6.13 with commit 1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0 and fixed in 7.3-rc6 with commit d2457a7e2727dc747a61a50d65c2f259afce8c45 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-2026-98729 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/x86/kernel/sys_x86_64.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/fe23680e6f1d52b8cc45d77bf7c54249508a81c7 https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45