{"id":"CVE-2026-74308","state":"PUBLISHED","title":"ext4: fix kernel BUG in ext4_write_inline_data_end","description":"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 > EXT4_I(inode)->i_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().","publishedAt":"2026-08-15T05:58:08.682Z","updatedAt":"2026-10-30T12:29:41.200Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"13db1ccae4d38f6d9296ee74aa1d39b429959ddb","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"260830a9a706f5d335398236fc788ce32f220de1","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"9808ae9fae996afa942bd963a39c9b1cdeebd0bd","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"f00f5c0dd55319bc33b76f72c853bda0e0a32eda","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"0ae42b51607240990614e0843f0d3529aaff62cc","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"ad09aa45965d3fafaf9963bc78109b73c0f9ac8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inode.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.8","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inode.c"]}],"references":["https://git.kernel.org/stable/c/13db1ccae4d38f6d9296ee74aa1d39b429959ddb","https://git.kernel.org/stable/c/260830a9a706f5d335398236fc788ce32f220de1","https://git.kernel.org/stable/c/9808ae9fae996afa942bd963a39c9b1cdeebd0bd","https://git.kernel.org/stable/c/f00f5c0dd55319bc33b76f72c853bda0e0a32eda","https://git.kernel.org/stable/c/0ae42b51607240990614e0843f0d3529aaff62cc","https://git.kernel.org/stable/c/ad09aa45965d3fafaf9963bc78109b73c0f9ac8d"],"weaknesses":[],"ingestedAt":"2026-10-30T12:48:04.825Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74308.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74308","state":"PUBLISHED","datePublished":"2026-08-15T05:58:08.682Z","dateUpdated":"2026-10-30T12:29:41.200Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.883Z"},"containers":{"cna":{"title":"ext4: fix kernel BUG in ext4_write_inline_data_end","descriptions":[{"lang":"en","value":"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 > EXT4_I(inode)->i_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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"13db1ccae4d38f6d9296ee74aa1d39b429959ddb","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"260830a9a706f5d335398236fc788ce32f220de1","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"9808ae9fae996afa942bd963a39c9b1cdeebd0bd","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"f00f5c0dd55319bc33b76f72c853bda0e0a32eda","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"0ae42b51607240990614e0843f0d3529aaff62cc","versionType":"git"},{"version":"3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb","status":"affected","lessThan":"ad09aa45965d3fafaf9963bc78109b73c0f9ac8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inode.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.8","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inode.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/13db1ccae4d38f6d9296ee74aa1d39b429959ddb"},{"url":"https://git.kernel.org/stable/c/260830a9a706f5d335398236fc788ce32f220de1"},{"url":"https://git.kernel.org/stable/c/9808ae9fae996afa942bd963a39c9b1cdeebd0bd"},{"url":"https://git.kernel.org/stable/c/f00f5c0dd55319bc33b76f72c853bda0e0a32eda"},{"url":"https://git.kernel.org/stable/c/0ae42b51607240990614e0843f0d3529aaff62cc"},{"url":"https://git.kernel.org/stable/c/ad09aa45965d3fafaf9963bc78109b73c0f9ac8d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:29:41.200Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}