{"dataType": "CVE_RECORD", "dataVersion": "5.2", "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": "2026-05-11T19:35:43.170Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:35:43.170Z"}, "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": 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Luego, cuando se elimina el conjunto, la devoluci\u00f3n de llamada ->destroy eliminar\u00e1 el elemento a trav\u00e9s de nf_tables_set_elem_destroy(), pero esta funci\u00f3n solo es segura para los elementos que se han desactivado antes de la fase de preparaci\u00f3n: la falta de una desactivaci\u00f3n anterior elimina el elemento pero filtra el recuento de uso de la cadena, lo que da como resultado un splat WARN cuando la cadena se elimina m\u00e1s tarde, adem\u00e1s de una fuga de la estructura nft_chain. Actualice pipapo_get() para no omitir los elementos vencidos, de lo contrario, el comando flush informa errores ENOENT falsos."}], "id": "CVE-2023-52924", "lastModified": "2025-10-15T20:04:35.060", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-05T10:15:21.073", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1da4874d05da1526b11b82fc7f3c7ac38749ddf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24138933b97b055d486e8064b4a1721702442a9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/59dab3bf0b8fc08eb802721c0532f13dd89209b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c7e658a36f8b1522bd3586d8137e5f93a25ddc5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94313a196b44184b5b52c1876da6a537701b425a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b15ea4017af82011dd55225ce77cce3d4dfc169c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bd156ce9553dcaf2d6ee2c825d1a5a1718e86524"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"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:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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"}

{"created": "2025-07-13T21:06:39.006317+00:00", "updated": "2025-07-13T21:06:39.006371+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}