{"id":"CVE-2026-98321","state":"PUBLISHED","title":"netfilter: nf_nat: unregister and release hooks on error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat: unregister and release hooks on error\n\nIf nf_hook_entries_insert_raw() fails, the NAT hooks get never released,\nresulting in a memleak.\n\nPostpone setting nat_proto_net->nat_hook_ops when the hooks are\nregistered to simplify the error path to decide whether the nat hooks\nneed unwinding.","publishedAt":"2026-10-06T08:46:15.546Z","updatedAt":"2026-10-19T09:17:31.752Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"79084567cd082fb4482e1ea457580e7d6504dd99","versionType":"git"},{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"df80342f4bfc023ad7d6703df5e27f583ff0cb8d","versionType":"git"},{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"cbdd39ce42530a193c56beb206a3356cb6d01016","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_core.c"]}],"references":["https://git.kernel.org/stable/c/79084567cd082fb4482e1ea457580e7d6504dd99","https://git.kernel.org/stable/c/df80342f4bfc023ad7d6703df5e27f583ff0cb8d","https://git.kernel.org/stable/c/cbdd39ce42530a193c56beb206a3356cb6d01016"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98321.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98321","state":"PUBLISHED","datePublished":"2026-10-06T08:46:15.546Z","dateUpdated":"2026-10-19T09:17:31.752Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.340Z"},"containers":{"cna":{"title":"netfilter: nf_nat: unregister and release hooks on error","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat: unregister and release hooks on error\n\nIf nf_hook_entries_insert_raw() fails, the NAT hooks get never released,\nresulting in a memleak.\n\nPostpone setting nat_proto_net->nat_hook_ops when the hooks are\nregistered to simplify the error path to decide whether the nat hooks\nneed unwinding."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"79084567cd082fb4482e1ea457580e7d6504dd99","versionType":"git"},{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"df80342f4bfc023ad7d6703df5e27f583ff0cb8d","versionType":"git"},{"version":"1cd472bf036ca038e783ef5f058f54e45b7e8180","status":"affected","lessThan":"cbdd39ce42530a193c56beb206a3356cb6d01016","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_nat_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/79084567cd082fb4482e1ea457580e7d6504dd99"},{"url":"https://git.kernel.org/stable/c/df80342f4bfc023ad7d6703df5e27f583ff0cb8d"},{"url":"https://git.kernel.org/stable/c/cbdd39ce42530a193c56beb206a3356cb6d01016"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:17:31.752Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}