{"cve":"CVE-2026-89776","nvd":{"published":"2026-09-16T09:17:07.950","modified":"2026-10-19T09:18:20.823","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes\n\nThe VXLAN VNI filter entry policy declares the GROUP/GROUP6 address\nattributes as NLA_BINARY with only a maximum length, so validate_nla()\naccepts a payload shorter than the address. The GROUP consumer reads it\nwith nla_get_in_addr(), an unconditional 4-byte load, so a short\nattribute over-reads up to 3 bytes of uninitialised slab data, which are\nstored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing\nkernel memory.\n\nSwitch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects\nany GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is\nalways sent at full width.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea","https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e","https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324","https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b","https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-89776","score":0.00211,"percentile":0.1129,"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."]}