{"cve":"CVE-2025-21903","nvd":{"published":"2025-04-01T16:15:20.757","modified":"2026-06-17T08:44:34.280","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmctp i3c: handle NULL header address\n\ndaddr can be NULL if there is no neighbour table entry present,\nin that case the tx packet should be dropped.\n\nsaddr will usually be set by MCTP core, but check for NULL in case a\npacket is transmitted by a different protocol.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/740bf9c9b715cc327d34b1e2d4ee79fcd4c47a56","https://git.kernel.org/stable/c/cf7ee25e70c6edfac4553d6b671e8b19db1d9573","https://git.kernel.org/stable/c/d8be54c35aee29d96d1350b1b6f153be4da37c07"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:00:28.034033815+00:00"},"epss":{"cve":"CVE-2025-21903","score":0.00203,"percentile":0.10317,"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."]}