{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-4015", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "state": "PUBLISHED", "assignerShortName": "Google", "dateReserved": "2023-07-31T10:37:30.332Z", "datePublished": "2023-09-06T13:52:44.724Z", "dateUpdated": "2025-02-13T17:03:23.988Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2023-09-10T11:06:38.175Z"}, "title": "Use-after-free in Linux kernel's netfilter: nf_tables component", "datePublic": "2023-07-26T14:48:49.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "description": "CWE-416 Use After Free", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "CAPEC-233 Privilege Escalation"}]}], "affected": [{"vendor": "Linux", "product": "Kernel", "packageName": "kernel", "repo": "https://git.kernel.org", "versions": [{"status": "affected", "version": "6.4", "lessThan": "6.5", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.\n\nWe recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2."}], "references": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2", "tags": ["patch"]}, {"url": "https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2"}, {"url": "https://www.debian.org/security/2023/dsa-5492"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Kevin Rich", "user": "00000000-0000-4000-9000-000000000000", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:17:11.558Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2", "tags": ["patch", "x_transferred"]}, {"url": "https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2", "tags": ["x_transferred"]}, {"url": "https://www.debian.org/security/2023/dsa-5492", "tags": ["x_transferred"]}]}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B2E42FC7-96D9-4DBC-B4C8-07C938D28182", "versionEndExcluding": "5.10.190", "versionStartIncluding": "5.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C069F09E-CA06-47B3-850D-ED23A9F4C096", "versionEndExcluding": "5.15.124", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A9E3E7AD-3EAC-485A-8673-5A89FB889587", "versionEndExcluding": "6.1.43", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6F5CB671-C757-4B7A-B3D3-283AFE20F0D7", "versionEndExcluding": "6.4.8", "versionStartIncluding": "6.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*", "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.\n\nWe recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2."}, {"lang": "es", "value": "Una vulnerabilidad de use-after-free en el netfilter del kernel de Linux: nf_tables componente puede ser explotado para lograr la escalada de privilegios locales. En un error al crear una regla nftables, desactivar expresiones inmediatas en nft_immediate_deactivate() puede llevar a desenlazar la cadena y los objetos se desactiven pero se usen m\u00e1s tarde. Recomendamos actualizar al commit anterior 0a771f7b266b02d262900c75f1e175c7fe76fec2."}], "id": "CVE-2023-4015", "lastModified": "2025-02-13T17:17:14.547", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "cve-coordination@google.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-09-06T14:15:11.093", "references": [{"source": "cve-coordination@google.com", "tags": ["Issue Tracking", "Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2"}, {"source": "cve-coordination@google.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2"}, {"source": "cve-coordination@google.com", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5492"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5492"}], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "cve-coordination@google.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:0461", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.18.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0461", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.18.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0448", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.48.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0439", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.48.1.rt14.333.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}], "bugzilla": {"description": "kernel: use after free in nft_immediate_deactivate", "id": "2237752", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237752"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.\nWe recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.", "A use-after-free flaw was found in the Linux kernel's netfilter: nf_tables component, which can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can unbind the chain and objects can be deactivated but used later."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is to skip loading the affected module \"netfilter\" onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time.\n~~~\nHow do I blacklist a kernel module to prevent it from loading automatically?\nhttps://access.redhat.com/solutions/41278 \n~~~"}, "name": "CVE-2023-4015", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2023-09-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-4015\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-4015\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2"], "statement": "Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace and on non-containerized deployments of Red Hat Enterprise Linux, you can disable user namespaces by setting user.max_user_namespaces to 0:\n# echo \"user.max_user_namespaces=0\" > /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\nOn containerized deployments such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.", "threat_severity": "Moderate", "upstream_fix": "Kernel 6.5-rc4"}