CVE-2021-45940

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:libbpf_project:libbpf:0.6.0:*:*:*:*:*:*:*", "matchCriteriaId": "21A21B76-426F-4B27-929B-2C021CB6AAAD", "vulnerable": true}, {"criteria": "cpe:2.3:a:libbpf_project:libbpf:0.6.1:*:*:*:*:*:*:*", "matchCriteriaId": "4F4BED3B-047A-493F-8E60-CB38AC0889E5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (4 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c)."}, {"lang": "es", "value": "libbpf versiones 0.6.0 y 0.6.1, presenta un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria (4 bytes) en la funci\u00f3n __bpf_object__open (llamado desde bpf_object__open_mem y bpf-object-fuzzer.c)."}], "id": "CVE-2021-45940", "lastModified": "2026-06-17T04:14:17.330", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-01-01T01:15:08.940", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40868"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1562.yaml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40868"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1562.yaml"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "libbpf: heap-based buffer overflow (4 bytes) in __bpf_object__open", "id": "2043383", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2043383"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-120->CWE-131", "details": ["libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (4 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c).", "A flaw was found in libbpf. The vulnerability occurs due to incorrect handling of memory in the __bpf_object__open function and leads to a heap-buffer-overflow. This flaw allows an attacker to execute unauthorized code or commands, read memory, or modify memory."], "name": "CVE-2021-45940", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "impact": "moderate", "package_name": "libbpf", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "impact": "moderate", "package_name": "libbpf", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2022-01-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-45940\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-45940"], "statement": "The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF.That means to exploit this vulnerability it would require a privileged user with CAP_SYS_ADMIN or root making the severity of this vulnerability as low.", "threat_severity": "Low"}

{}