{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89776","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.765Z","datePublished":"2026-09-16T08:48:17.084Z","dateUpdated":"2026-09-16T08:48:17.084Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-16T08:48:17.084Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vxlan/vxlan_vnifilter.c"],"versions":[{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"e12c4663529699f457b2988c1dfedf4d13b3b3be","status":"affected","versionType":"git"},{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"47bfcc871576eaef6c8edab6749acd4b317306ea","status":"affected","versionType":"git"},{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"a9ec10815199f9879ba080241dc555efb1daf324","status":"affected","versionType":"git"},{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"daebc7064a1b4c12c98e52c4bceede7f2fcd573c","status":"affected","versionType":"git"},{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"ad32e564c62ebf5ba76dd60a22af52c69d54d17b","status":"affected","versionType":"git"},{"version":"f9c4bb0b245cee35ef66f75bf409c9573d934cf9","lessThan":"984f831dda31b3a18f47454cf64989f65402879e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vxlan/vxlan_vnifilter.c"],"versions":[{"version":"5.18","status":"affected"},{"version":"0","lessThan":"5.18","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be"},{"url":"https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea"},{"url":"https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324"},{"url":"https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c"},{"url":"https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b"},{"url":"https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e"}],"title":"vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes","x_generator":{"engine":"bippy-1.2.0"}}}}