{"cve":"CVE-2025-21766","nvd":{"published":"2025-02-27T03:15:17.273","modified":"2026-10-15T22:18:08.290","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: use RCU protection in __ip_rt_update_pmtu()\n\n__ip_rt_update_pmtu() must use RCU protection to make\nsure the net structure it reads does not disappear.","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/139512191bd06f1b496117c76372b2ce372c9a41","https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152a","https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4","https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664e","https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-21766","score":0.0057,"percentile":0.46904,"date":"2026-10-25"},"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."]}