{"cve":"CVE-2025-21815","nvd":{"published":"2025-02-27T20:16:04.063","modified":"2026-06-17T08:44:21.663","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/compaction: fix UBSAN shift-out-of-bounds warning\n\nsyzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order)\nin isolate_freepages_block().  The bogus compound_order can be any value\nbecause it is union with flags.  Add back the MAX_PAGE_ORDER check to fix\nthe warning.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/10b7d3eb535098ccd4c82a182a33655d8a0e5c88","https://git.kernel.org/stable/c/4491159774d973a9e2e998d25d8fbb20fada6dfa","https://git.kernel.org/stable/c/d1366e74342e75555af2648a2964deb2d5c92200"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-21815","score":0.00193,"percentile":0.09015,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}