{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-52924","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-08-21T06:07:11.018Z","datePublished":"2025-02-05T09:07:55.418Z","dateUpdated":"2025-05-04T07:46:06.745Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:46:06.745Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: don't skip expired elements during walk\n\nThere is an asymmetry between commit/abort and preparation phase if the\nfollowing conditions are met:\n\n1. set is a verdict map (\"1.2.3.4 : jump foo\")\n2. timeouts are enabled\n\nIn this case, following sequence is problematic:\n\n1. element E in set S refers to chain C\n2. userspace requests removal of set S\n3. kernel does a set walk to decrement chain->use count for all elements\n   from preparation phase\n4. kernel does another set walk to remove elements from the commit phase\n   (or another walk to do a chain->use increment for all elements from\n    abort phase)\n\nIf E has already expired in 1), it will be ignored during list walk, so its use count\nwon't have been changed.\n\nThen, when set is culled, ->destroy callback will zap the element via\nnf_tables_set_elem_destroy(), but this function is only safe for\nelements that have been deactivated earlier from the preparation phase:\nlack of earlier deactivate removes the element but leaks the chain use\ncount, which results in a WARN splat when the chain gets removed later,\nplus a leak of the nft_chain structure.\n\nUpdate pipapo_get() not to skip expired elements, otherwise flush\ncommand reports bogus ENOENT errors."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c","net/netfilter/nft_set_hash.c","net/netfilter/nft_set_pipapo.c","net/netfilter/nft_set_rbtree.c"],"versions":[{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"94313a196b44184b5b52c1876da6a537701b425a","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"1da4874d05da1526b11b82fc7f3c7ac38749ddf8","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"b15ea4017af82011dd55225ce77cce3d4dfc169c","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"7c7e658a36f8b1522bd3586d8137e5f93a25ddc5","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"59dab3bf0b8fc08eb802721c0532f13dd89209b8","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"bd156ce9553dcaf2d6ee2c825d1a5a1718e86524","status":"affected","versionType":"git"},{"version":"9d0982927e79049675cb6c6c04a0ebb3dad5a434","lessThan":"24138933b97b055d486e8064b4a1721702442a9b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c","net/netfilter/nft_set_hash.c","net/netfilter/nft_set_pipapo.c","net/netfilter/nft_set_rbtree.c"],"versions":[{"version":"4.1","status":"affected"},{"version":"0","lessThan":"4.1","status":"unaffected","versionType":"semver"},{"version":"4.19.316","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.262","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.198","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.134","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.56","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.4.11","lessThanOrEqual":"6.4.*","status":"unaffected","versionType":"semver"},{"version":"6.5","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":"4.1","versionEndExcluding":"4.19.316"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.4.262"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.10.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.15.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.1.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.4.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.5"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/94313a196b44184b5b52c1876da6a537701b425a"},{"url":"https://git.kernel.org/stable/c/1da4874d05da1526b11b82fc7f3c7ac38749ddf8"},{"url":"https://git.kernel.org/stable/c/b15ea4017af82011dd55225ce77cce3d4dfc169c"},{"url":"https://git.kernel.org/stable/c/7c7e658a36f8b1522bd3586d8137e5f93a25ddc5"},{"url":"https://git.kernel.org/stable/c/59dab3bf0b8fc08eb802721c0532f13dd89209b8"},{"url":"https://git.kernel.org/stable/c/bd156ce9553dcaf2d6ee2c825d1a5a1718e86524"},{"url":"https://git.kernel.org/stable/c/24138933b97b055d486e8064b4a1721702442a9b"}],"title":"netfilter: nf_tables: don't skip expired elements during walk","x_generator":{"engine":"bippy-1.2.0"}}}}