{"cvss":7.8,"datePublished":"2026-07-19T16:17:48.407","dateUpdated":"2026-09-03T14:32:51.083","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: add and use xtables_unregister_table_exit\n\nPrevious change added xtables_unregister_table_pre_exit to detach the\ntable from the packetpath and to unlink it from the active table list.\nIn case of rmmod, userspace that is doing set/getsockopt for this table\nwill not be able to re-instantiate the table:\n 1. The larval table has been removed already\n 2. existing instantiated table is no longer on the xt pernet table list.\n\nThis adds the second stage helper:\n\nunlink the table from the dying list, free the hook ops (if any) and do\nthe audit notification.  It replaces xt_unregister_table().","id":"CVE-2026-64078","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/netfilter/x_tables.h","net/ipv4/netfilter/arp_tables.c","net/ipv4/netfilter/ip_tables.c","net/ipv4/netfilter/iptable_nat.c","net/ipv6/netfilter/ip6_tables.c","net/ipv6/netfilter/ip6table_nat.c","net/netfilter/x_tables.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"86ee5bc9c0f0e652e19f395675a432de11b75514","status":"affected","version":"fdacd57c79b79a03c7ca88f706ad9fb7b46831c1","versionType":"git"},{"lessThan":"8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf","status":"affected","version":"fdacd57c79b79a03c7ca88f706ad9fb7b46831c1","versionType":"git"},{"lessThan":"b4597d5fd7d2f8cebfffd40dffb5e003cc78964c","status":"affected","version":"fdacd57c79b79a03c7ca88f706ad9fb7b46831c1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/netfilter/x_tables.h","net/ipv4/netfilter/arp_tables.c","net/ipv4/netfilter/ip_tables.c","net/ipv4/netfilter/iptable_nat.c","net/ipv6/netfilter/ip6_tables.c","net/ipv6/netfilter/ip6table_nat.c","net/netfilter/x_tables.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"1111B859-7CF3-4F75-8724-625922494032","versionEndExcluding":"6.18.34","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"0520D091-FC52-4A50-AF07-70AE7D08B750","versionEndExcluding":"7.0.11","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*","matchCriteriaId":"B1EF7059-E670-45F4-B422-54C40FA86390","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*","matchCriteriaId":"0D38F0BF-A728-4133-A358-D44A2F7EE6D6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*","matchCriteriaId":"EC732D08-5F7B-46D9-B154-E60C7F4F0A97","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: add and use xtables_unregister_table_exit\n\nPrevious change added xtables_unregister_table_pre_exit to detach the\ntable from the packetpath and to unlink it from the active table list.\nIn case of rmmod, userspace that is doing set/getsockopt for this table\nwill not be able to re-instantiate the table:\n 1. The larval table has been removed already\n 2. existing instantiated table is no longer on the xt pernet table list.\n\nThis adds the second stage helper:\n\nunlink the table from the dying list, free the hook ops (if any) and do\nthe audit notification.  It replaces xt_unregister_table()."}],"id":"CVE-2026-64078","lastModified":"2026-09-03T14:32:51.083","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":5.9,"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary"}]},"published":"2026-07-19T16:17:48.407","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/8026e5163cca1d1db436c7bfb89ddea8b5e8c2cf"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/86ee5bc9c0f0e652e19f395675a432de11b75514"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/b4597d5fd7d2f8cebfffd40dffb5e003cc78964c"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Analyzed","weaknesses":[{"description":[{"lang":"en","value":"NVD-CWE-noinfo"}],"source":"nvd@nist.gov","type":"Primary"}]},"severity":"HIGH","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: add and use xtables_unregis..."}