{"cve":"CVE-2026-63969","nvd":{"published":"2026-07-19T16:17:15.947","modified":"2026-07-30T14:51:11.223","status":"Awaiting Analysis","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible infinite loop in rt6_fill_node()\n\nSashiko reported this issue [1]. Apply the same fix as\ncommit f8d8ce1b515a (\"ipv6: fix possible infinite loop in fib6_info_uses_dev()\").\n\nWriters holding tb6_lock can list_del_rcu(&rt->fib6_siblings)\nwithout waiting for RCU readers; rt->fib6_siblings.next then still\npoints into the old ring and this softirq-side walker never reaches\n&rt->fib6_siblings, causing a CPU stall. fib6_del_route() always\nWRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an\ninside-loop check is a reliable detach signal.\n\n[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383","https://git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d","https://git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc","https://git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529","https://git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-63969","score":0.00211,"percentile":0.11398,"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."]}