{"cve":"CVE-2026-31738","nvd":{"published":"2026-05-01T15:16:36.473","modified":"2026-06-17T10:34:20.430","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: validate ND option lengths in vxlan_na_create\n\nvxlan_na_create() walks ND options according to option-provided\nlengths. A malformed option can make the parser advance beyond the\ncomputed option span or use a too-short source LLADDR option payload.\n\nValidate option lengths against the remaining NS option area before\nadvancing, and only read source LLADDR when the option is large enough\nfor an Ethernet address.","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/2029712fb2c87e9a8c75094906f2ee29bf08c500","https://git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7","https://git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958","https://git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385","https://git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-31738","score":0.00123,"percentile":0.0203,"date":"2026-10-31"},"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."]}