{"id":"CVE-2023-53304","state":"PUBLISHED","title":"netfilter: nft_set_rbtree: fix overlap expiration walk","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: fix overlap expiration walk\n\nThe lazy gc on insert that should remove timed-out entries fails to release\nthe other half of the interval, if any.\n\nCan be reproduced with tests/shell/testcases/sets/0044interval_overlap_0\nin nftables.git and kmemleak enabled kernel.\n\nSecond bug is the use of rbe_prev vs. prev pointer.\nIf rbe_prev() returns NULL after at least one iteration, rbe_prev points\nto element that is not an end interval, hence it should not be removed.\n\nLastly, check the genmask of the end interval if this is active in the\ncurrent generation.","publishedAt":"2025-09-16T16:11:44.147Z","updatedAt":"2026-05-23T15:28:30.909Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ab87a326f20c52ff4d9972052d085be951c704b","status":"affected","lessThan":"8284a79136c384059e85e278da2210b809730287","versionType":"git"},{"version":"181859bdfb9734aca449512fccaee4cacce64aed","status":"affected","lessThan":"acaee227cf79c45a5d2d49c3e9a66333a462802c","versionType":"git"},{"version":"4aacf3d78424293e318c616016865380b37b9cc5","status":"affected","lessThan":"893cb3c3513cf661a0ff45fe0cfa83fe27131f76","versionType":"git"},{"version":"2bf1435fa19d2c58054391b3bba40d5510a5758c","status":"affected","lessThan":"50cbb9d195c197af671869c8cadce3bd483735a0","versionType":"git"},{"version":"318cb24a4c3fce8140afaf84e4d45fcb76fb280b","status":"affected","lessThan":"89a4d1a89751a0fbd520e64091873e19cc0979e8","versionType":"git"},{"version":"c9e6978e2725a7d4b6cd23b2facd3f11422c0643","status":"affected","lessThan":"cd66733932399475fe933cb3ec03e687ed401462","versionType":"git"},{"version":"c9e6978e2725a7d4b6cd23b2facd3f11422c0643","status":"affected","lessThan":"f718863aca469a109895cb855e6b81fff4827d71","versionType":"git"},{"version":"5.10.166","status":"affected","lessThan":"5.10.190","versionType":"semver"},{"version":"5.15.91","status":"affected","lessThan":"5.15.124","versionType":"semver"},{"version":"6.1.9","status":"affected","lessThan":"6.1.43","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_rbtree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"5.10.190","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.124","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.43","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.8","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_rbtree.c"]}],"references":["https://git.kernel.org/stable/c/8284a79136c384059e85e278da2210b809730287","https://git.kernel.org/stable/c/acaee227cf79c45a5d2d49c3e9a66333a462802c","https://git.kernel.org/stable/c/893cb3c3513cf661a0ff45fe0cfa83fe27131f76","https://git.kernel.org/stable/c/50cbb9d195c197af671869c8cadce3bd483735a0","https://git.kernel.org/stable/c/89a4d1a89751a0fbd520e64091873e19cc0979e8","https://git.kernel.org/stable/c/cd66733932399475fe933cb3ec03e687ed401462","https://git.kernel.org/stable/c/f718863aca469a109895cb855e6b81fff4827d71"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53304.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53304","state":"PUBLISHED","datePublished":"2025-09-16T16:11:44.147Z","dateUpdated":"2026-05-23T15:28:30.909Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-16T08:09:37.994Z"},"containers":{"cna":{"title":"netfilter: nft_set_rbtree: fix overlap expiration walk","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: fix overlap expiration walk\n\nThe lazy gc on insert that should remove timed-out entries fails to release\nthe other half of the interval, if any.\n\nCan be reproduced with tests/shell/testcases/sets/0044interval_overlap_0\nin nftables.git and kmemleak enabled kernel.\n\nSecond bug is the use of rbe_prev vs. prev pointer.\nIf rbe_prev() returns NULL after at least one iteration, rbe_prev points\nto element that is not an end interval, hence it should not be removed.\n\nLastly, check the genmask of the end interval if this is active in the\ncurrent generation."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ab87a326f20c52ff4d9972052d085be951c704b","status":"affected","lessThan":"8284a79136c384059e85e278da2210b809730287","versionType":"git"},{"version":"181859bdfb9734aca449512fccaee4cacce64aed","status":"affected","lessThan":"acaee227cf79c45a5d2d49c3e9a66333a462802c","versionType":"git"},{"version":"4aacf3d78424293e318c616016865380b37b9cc5","status":"affected","lessThan":"893cb3c3513cf661a0ff45fe0cfa83fe27131f76","versionType":"git"},{"version":"2bf1435fa19d2c58054391b3bba40d5510a5758c","status":"affected","lessThan":"50cbb9d195c197af671869c8cadce3bd483735a0","versionType":"git"},{"version":"318cb24a4c3fce8140afaf84e4d45fcb76fb280b","status":"affected","lessThan":"89a4d1a89751a0fbd520e64091873e19cc0979e8","versionType":"git"},{"version":"c9e6978e2725a7d4b6cd23b2facd3f11422c0643","status":"affected","lessThan":"cd66733932399475fe933cb3ec03e687ed401462","versionType":"git"},{"version":"c9e6978e2725a7d4b6cd23b2facd3f11422c0643","status":"affected","lessThan":"f718863aca469a109895cb855e6b81fff4827d71","versionType":"git"},{"version":"5.10.166","status":"affected","lessThan":"5.10.190","versionType":"semver"},{"version":"5.15.91","status":"affected","lessThan":"5.15.124","versionType":"semver"},{"version":"6.1.9","status":"affected","lessThan":"6.1.43","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_rbtree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"5.10.190","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.124","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.43","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.8","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_rbtree.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8284a79136c384059e85e278da2210b809730287"},{"url":"https://git.kernel.org/stable/c/acaee227cf79c45a5d2d49c3e9a66333a462802c"},{"url":"https://git.kernel.org/stable/c/893cb3c3513cf661a0ff45fe0cfa83fe27131f76"},{"url":"https://git.kernel.org/stable/c/50cbb9d195c197af671869c8cadce3bd483735a0"},{"url":"https://git.kernel.org/stable/c/89a4d1a89751a0fbd520e64091873e19cc0979e8"},{"url":"https://git.kernel.org/stable/c/cd66733932399475fe933cb3ec03e687ed401462"},{"url":"https://git.kernel.org/stable/c/f718863aca469a109895cb855e6b81fff4827d71"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:28:30.909Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.166","versionEndExcluding":"5.10.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.91","versionEndExcluding":"5.15.124"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.9","versionEndExcluding":"6.1.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.4.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53304","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:22:49.464474Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T18:22:59.263Z"}}]}}}