{"id":"CVE-2026-74308","summary":"ext4: fix kernel BUG in ext4_write_inline_data_end","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix kernel BUG in ext4_write_inline_data_end\n\nWhen the data=journal mount option is used, the ext4_journalled_write_end()\nfunction incorrectly calls ext4_write_inline_data_end() without checking\nif the EXT4_STATE_MAY_INLINE_DATA flag is still set on the inode.\n\nIf a previous attempt to convert the inline data to an extent failed (e.g.\ndue to ENOSPC), the EXT4_STATE_MAY_INLINE_DATA flag is cleared, but\nthe EXT4_INODE_INLINE_DATA flag remains set. In this scenario, the next\ncall to ext4_write_begin() will not prepare the inline data xattr for\nwriting, but ext4_journalled_write_end() will incorrectly attempt to write\nto it, triggering a BUG_ON(pos + len \u003e EXT4_I(inode)-\u003ei_inline_size) in\next4_write_inline_data() since i_inline_size was not expanded.\n\nFix this by ensuring that ext4_journalled_write_end() only calls\next4_write_inline_data_end() if the EXT4_STATE_MAY_INLINE_DATA flag is\nset, mirroring the behavior of ext4_write_end() and ext4_da_write_end().","modified":"2026-08-18T03:30:56.868600534Z","published":"2026-08-15T05:58:08.682Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74308.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ae42b51607240990614e0843f0d3529aaff62cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/260830a9a706f5d335398236fc788ce32f220de1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9808ae9fae996afa942bd963a39c9b1cdeebd0bd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad09aa45965d3fafaf9963bc78109b73c0f9ac8d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f00f5c0dd55319bc33b76f72c853bda0e0a32eda"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74308.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74308"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb"},{"fixed":"260830a9a706f5d335398236fc788ce32f220de1"},{"fixed":"9808ae9fae996afa942bd963a39c9b1cdeebd0bd"},{"fixed":"f00f5c0dd55319bc33b76f72c853bda0e0a32eda"},{"fixed":"0ae42b51607240990614e0843f0d3529aaff62cc"},{"fixed":"ad09aa45965d3fafaf9963bc78109b73c0f9ac8d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74308.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74308.json"}}],"schema_version":"1.9.0"}