{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-26704","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.158Z","datePublished":"2024-04-03T14:55:02.672Z","dateUpdated":"2026-05-11T20:02:34.131Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T20:02:34.131Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix double-free of blocks due to wrong extents moved_len\n\nIn ext4_move_extents(), moved_len is only updated when all moves are\nsuccessfully executed, and only discards orig_inode and donor_inode\npreallocations when moved_len is not zero. When the loop fails to exit\nafter successfully moving some extents, moved_len is not updated and\nremains at 0, so it does not discard the preallocations.\n\nIf the moved extents overlap with the preallocated extents, the\noverlapped extents are freed twice in ext4_mb_release_inode_pa() and\next4_process_freed_data() (as described in commit 94d7c16cbbbd (\"ext4:\nFix double-free of blocks with EXT4_IOC_MOVE_EXT\")), and bb_free is\nincremented twice. Hence when trim is executed, a zero-division bug is\ntriggered in mb_update_avg_fragment_size() because bb_free is not zero\nand bb_fragments is zero.\n\nTherefore, update move_len after each extent move to avoid the issue."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/move_extent.c"],"versions":[{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"b4fbb89d722cbb16beaaea234b7230faaaf68c71","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"afbcad9ae7d6d11608399188f03a837451b6b3a1","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"d033a555d9a1cf53dbf3301af7199cc4a4c8f537","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"afba9d11320dad5ce222ac8964caf64b7b4bedb1","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"2883940b19c38d5884c8626483811acf4d7e148f","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"559ddacb90da1d8786dd8ec4fd76bbfa404eaef6","status":"affected","versionType":"git"},{"version":"fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a","lessThan":"55583e899a5357308274601364741a83e78d6ac4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/move_extent.c"],"versions":[{"version":"3.18","status":"affected"},{"version":"0","lessThan":"3.18","status":"unaffected","versionType":"semver"},{"version":"4.19.307","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.269","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.210","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.149","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.79","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.18","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.6","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"4.19.307"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.4.269"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.10.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.15.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.1.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.6.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.7.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71"},{"url":"https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1"},{"url":"https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537"},{"url":"https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1"},{"url":"https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1"},{"url":"https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f"},{"url":"https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6"},{"url":"https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4"}],"title":"ext4: fix double-free of blocks due to wrong extents moved_len","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:14:12.613Z"},"title":"CVE Program 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