{"id":"CVE-2025-40293","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-40293","generatedAt":"2026-10-28T01:49:31.254Z","title":"In the Linux kernel, the following vulnerability has been resolved: iommufd: Don't overflow during division for dirty tracking If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Don't overflow during division for dirty tracking\n\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow\nto 0 and this triggers divide by 0.\n\nIn this case the index should just be 0, so reorganize things to divide\nby shift and avoid hitting any overflows.","published":"2025-12-08T01:16:01.000Z","lastModified":"2026-10-14T22:10:00.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00201,"percentile":0.09896,"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":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40293","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."}