{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: don't enable DAX on new encrypted files\n\nCurrently, when a new encrypted regular file is created, the call to\next4_set_inode_flags(inode, init=true) in __ext4_new_inode() is made\nbefore EXT4_INODE_ENCRYPT is set. As a result, it can set S_DAX if the\nfilesystem is mounted with \"-o dax=always\".\n\nEXT4_INODE_ENCRYPT then actually gets set a bit later in\n__ext4_new_inode(), when it calls fscrypt_set_context() which calls\next4_set_context(). ext4_set_context() sets EXT4_INODE_ENCRYPT and\ncalls ext4_set_inode_flags(inode, init=false) to set S_ENCRYPTED too.\n\nThis was intended to clear S_DAX as well. However, this was broken by\ncommit 043546e46dc7 (\"fs/ext4: Only change S_DAX on inode load\"). This\ncauses data written to the file to bypass encryption, also causing\nxfstests failures such as generic/548 (when \"-o dax=always\" is used).\n\nFix this by simplifying the flow by making __ext4_new_inode() set\nEXT4_INODE_ENCRYPT earlier. This makes it take effect in\next4_set_inode_flags(inode, init=true), making S_DAX never be set.\n\nSimilarly, make EXT4_STATE_MAY_INLINE_DATA never be set in the first\nplace on new encrypted inodes. Then it doesn't need to be cleared.\n\nAs a result of these simplifications, ext4_set_context() no longer needs\nto change inode flags or state when 'handle != NULL'. Remove that too.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80806" }, { "summary":"CVE-2026-80806 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-80806.json" }, { "summary":"openEuler-SA-2026-4357", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4357" }, { "summary":"CVE-2026-80806", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-80806&packageName=kernel" } ], "title":"openEuler cve CVE-2026-80806", "tracking":{ "initial_release_date":"2026-10-22T10:24:20+08:00", "revision_history":[ { "date":"2026-10-22T10:24:20+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-10-22T10:24:20+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, 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files\n\nCurrently, when a new encrypted regular file is created, the call to\next4_set_inode_flags(inode, init=true) in __ext4_new_inode() is made\nbefore EXT4_INODE_ENCRYPT is set. As a result, it can set S_DAX if the\nfilesystem is mounted with \"-o dax=always\".\n\nEXT4_INODE_ENCRYPT then actually gets set a bit later in\n__ext4_new_inode(), when it calls fscrypt_set_context() which calls\next4_set_context(). ext4_set_context() sets EXT4_INODE_ENCRYPT and\ncalls ext4_set_inode_flags(inode, init=false) to set S_ENCRYPTED too.\n\nThis was intended to clear S_DAX as well. However, this was broken by\ncommit 043546e46dc7 (\"fs/ext4: Only change S_DAX on inode load\"). This\ncauses data written to the file to bypass encryption, also causing\nxfstests failures such as generic/548 (when \"-o dax=always\" is used).\n\nFix this by simplifying the flow by making __ext4_new_inode() set\nEXT4_INODE_ENCRYPT earlier. This makes it take effect in\next4_set_inode_flags(inode, init=true), making S_DAX never be set.\n\nSimilarly, make EXT4_STATE_MAY_INLINE_DATA never be set in the first\nplace on new encrypted inodes. Then it doesn't need to be cleared.\n\nAs a result of these simplifications, ext4_set_context() no longer needs\nto change inode flags or state when 'handle != NULL'. Remove that too.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:bpftool-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:bpftool-debuginfo-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debuginfo-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debugsource-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-devel-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-headers-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-source-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-tools-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-tools-debuginfo-5.10.0-337.0.0.238.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-tools-devel-5.10.0-337.0.0.238.oe2203sp4.aarch64", 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"openEuler-22.03-LTS-SP4:python3-perf-debuginfo-5.10.0-337.0.0.238.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-337.0.0.238.oe2203sp4.src" ] } ], "threats":[ { "details":"Low", "category":"impact" } ], "title":"CVE-2026-80806" } ] }