{"cve":"CVE-2025-21734","nvd":{"published":"2025-02-27T03:15:14.030","modified":"2026-07-30T06:21:14.637","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix copy buffer page size\n\nFor non-registered buffer, fastrpc driver copies the buffer and\npass it to the remote subsystem. There is a problem with current\nimplementation of page size calculation which is not considering\nthe offset in the calculation. This might lead to passing of\nimproper and out-of-bounds page size which could result in\nmemory issue. Calculate page start and page end using the offset\nadjusted address instead of absolute address.","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:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/24a79c6bc8de763f7c50f4f84f8b0c183bc25a51","https://git.kernel.org/stable/c/c0464bad0e85fcd5d47e4297d1e410097c979e55","https://git.kernel.org/stable/c/c3f7161123fcbdc64e90119ccce292d8b66281c4","https://git.kernel.org/stable/c/c56ba3ea8e3c9a69a992aad18f7a65e43e51d623","https://git.kernel.org/stable/c/e966eae72762ecfdbdb82627e2cda48845b9dd66"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-21734","score":0.00204,"percentile":0.10375,"date":"2026-10-31"},"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."]}