{"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": "2025-02-05T09:07:55.418Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-02-05T09:07:55.418Z"}, "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"}]}], "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-5f407fcff5a0"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2023-52924", "lastModified": "2025-02-05T10:15:21.073", "metrics": {}, "published": "2025-02-05T10:15:21.073", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1da4874d05da1526b11b82fc7f3c7ac38749ddf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24138933b97b055d486e8064b4a1721702442a9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/59dab3bf0b8fc08eb802721c0532f13dd89209b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7c7e658a36f8b1522bd3586d8137e5f93a25ddc5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/94313a196b44184b5b52c1876da6a537701b425a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b15ea4017af82011dd55225ce77cce3d4dfc169c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bd156ce9553dcaf2d6ee2c825d1a5a1718e86524"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: nf_tables: don't skip expired elements during walk", "id": "2343897", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2343897"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-664", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: nf_tables: don't skip expired elements during walk\nThere is an asymmetry between commit/abort and preparation phase if the\nfollowing conditions are met:\n1. set is a verdict map (\"1.2.3.4 : jump foo\")\n2. timeouts are enabled\nIn this case, following sequence is problematic:\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\nfrom 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\nabort phase)\nIf E has already expired in 1), it will be ignored during list walk, so its use count\nwon't have been changed.\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.\nUpdate pipapo_get() not to skip expired elements, otherwise flush\ncommand reports bogus ENOENT errors."], "name": "CVE-2023-52924", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52924\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52924\nhttps://lore.kernel.org/linux-cve-announce/2025020500-CVE-2023-52924-03d7@gregkh/T"], "threat_severity": "Moderate"}