{"api_version":"1","generated_at":"2026-08-15T08:03:52+00:00","cve":"CVE-2026-74349","urls":{"html":"https://cve.report/CVE-2026-74349","api":"https://cve.report/api/cve/CVE-2026-74349.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74349","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74349"},"summary":{"title":"ocfs2: reject FITRIM ranges shorter than a cluster","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject FITRIM ranges shorter than a cluster\n\nocfs2_trim_mainbm() trims the global bitmap in cluster units, but its\ntoo-short range validation only checks sb->s_blocksize.\n\nOn filesystems with a cluster size larger than the block size, a FITRIM\nrange that is at least one block but shorter than one cluster is accepted\nand shifted down to len == 0.  The later start + len - 1 and len -= ... \narithmetic then underflows and can drive trimming past the requested\nrange.\n\nReject ranges shorter than s_clustersize instead.  That preserves the\nexisting -EINVAL behavior for requests that cannot discard even one\nallocation unit and keeps zero-cluster trims out of the group walk.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:36","updated_at":"2026-08-15 06:22:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7","name":"https://git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d","name":"https://git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543","name":"https://git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21","name":"https://git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57","name":"https://git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e","name":"https://git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d903d59c0315f59bdf0214b4f13d71c9feb2c45c","name":"https://git.kernel.org/stable/c/d903d59c0315f59bdf0214b4f13d71c9feb2c45c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd","name":"https://git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74349","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74349","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa89762c54800208d5afdcd8e6bf124818f17fe0 d903d59c0315f59bdf0214b4f13d71c9feb2c45c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa89762c54800208d5afdcd8e6bf124818f17fe0 441abb77222f155e8d931dbabb465466db01cfd7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa89762c54800208d5afdcd8e6bf124818f17fe0 e652d0f5108e447b22da4249bcd23dd1b63c73dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa89762c54800208d5afdcd8e6bf124818f17fe0 346314bb0cc2fc52b50b73d6ecc62e0217455c2e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * 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the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject FITRIM ranges shorter than a cluster\n\nocfs2_trim_mainbm() trims the global bitmap in cluster units, but its\ntoo-short range validation only checks sb->s_blocksize.\n\nOn filesystems with a cluster size larger than the block size, a FITRIM\nrange that is at least one block but shorter than one cluster is accepted\nand shifted down to len == 0.  The later start + len - 1 and len -= ... \narithmetic then underflows and can drive trimming past the requested\nrange.\n\nReject ranges shorter than s_clustersize instead.  That preserves the\nexisting -EINVAL behavior for requests that cannot discard even one\nallocation unit and keeps zero-cluster trims out of the group walk."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:58:36.630Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d903d59c0315f59bdf0214b4f13d71c9feb2c45c"},{"url":"https://git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7"},{"url":"https://git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd"},{"url":"https://git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e"},{"url":"https://git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d"},{"url":"https://git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21"},{"url":"https://git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57"},{"url":"https://git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543"}],"title":"ocfs2: reject FITRIM ranges shorter than a cluster","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74349","datePublished":"2026-08-15T05:58:36.630Z","dateReserved":"2026-08-15T05:44:03.886Z","dateUpdated":"2026-08-15T05:58:36.630Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:36","lastModifiedDate":"2026-08-15 06:22:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74349","Ordinal":"1","Title":"ocfs2: reject FITRIM ranges shorter than a cluster","CVE":"CVE-2026-74349","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74349","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: reject FITRIM ranges shorter than a cluster\n\nocfs2_trim_mainbm() trims the global bitmap in cluster units, but its\ntoo-short range validation only checks sb->s_blocksize.\n\nOn filesystems with a cluster size larger than the block size, a FITRIM\nrange that is at least one block but shorter than one cluster is accepted\nand shifted down to len == 0.  The later start + len - 1 and len -= ... \narithmetic then underflows and can drive trimming past the requested\nrange.\n\nReject ranges shorter than s_clustersize instead.  That preserves the\nexisting -EINVAL behavior for requests that cannot discard even one\nallocation unit and keeps zero-cluster trims out of the group walk.","Type":"Description","Title":"ocfs2: reject FITRIM ranges shorter than a cluster"}]}}}