{"id":"CVE-2026-89776","revision":"b140dea8566740bf9531da55ae2753ca","records":[{"revision":"b140dea8566740bf9531da55ae2753ca","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89776","aliases":[],"title":"vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes","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.","state":0,"publishedAt":"2026-09-16T08:48:17.084+00:00","modifiedAt":"2026-10-19T08:52:28.559+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/vxlan/vxlan_vnifilter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"e12c4663529699f457b2988c1dfedf4d13b3b3be\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"47bfcc871576eaef6c8edab6749acd4b317306ea\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"a9ec10815199f9879ba080241dc555efb1daf324\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"daebc7064a1b4c12c98e52c4bceede7f2fcd573c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"ad32e564c62ebf5ba76dd60a22af52c69d54d17b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f9c4bb0b245cee35ef66f75bf409c9573d934cf9\",\n                            \"lessThan\": \"984f831dda31b3a18f47454cf64989f65402879e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/vxlan/vxlan_vnifilter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be","https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea","https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324","https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c","https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b","https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89776","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89776","identifiers":["CVE-2026-89776"]},"retained":false,"historicalAffected":[]}],"coverage":[]}