{"cve":"CVE-2025-21800","nvd":{"published":"2025-02-27T20:16:02.660","modified":"2026-06-17T08:44:18.730","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, fix definer's HWS_SET32 macro for negative offset\n\nWhen bit offset for HWS_SET32 macro is negative,\nUBSAN complains about the shift-out-of-bounds:\n\n  UBSAN: shift-out-of-bounds in\n  drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c:177:2\n  shift exponent -8 is negative","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":[],"references":["https://git.kernel.org/stable/c/69c676c0ded472713e6d1b3a456b3c4f52f66f0e","https://git.kernel.org/stable/c/92cff996624c4757d5bbace3dfa3f1567ba94143","https://git.kernel.org/stable/c/be482f1d10da781db9445d2753c1e3f1fd82babf"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-21800","score":0.00214,"percentile":0.11802,"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."]}