{"id":"CVE-2026-74349","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74349","generatedAt":"2026-10-28T00:19:01.843Z","title":"In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject FITRIM ranges shorter than a cluster ocfs2_trim_mainbm() trims the global bitmap in cluster units, but its too-short range validation only checks sb->s_blocksize.","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.","published":"2026-08-15T06:22:36.000Z","lastModified":"2026-10-16T19:17:41.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00126,"percentile":0.02274,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d903d59c0315f59bdf0214b4f13d71c9feb2c45c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74349","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}