{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6244", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "state": "PUBLISHED", "assignerShortName": "Tcpdump", "dateReserved": "2026-04-13T17:26:27.568Z", "datePublished": "2026-09-05T18:50:39.649Z", "dateUpdated": "2026-09-08T15:13:31.774Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "modules": ["BPF interpreter"], "product": "libpcap", "programFiles": ["bpf_filter.c"], "programRoutines": [{"name": "pcapint_filter_with_aux_data()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"lessThan": "1.10.7", "status": "affected", "version": "0", "versionType": "semver"}]}], "configurations": [{"lang": "en", "value": "The problem is specific to applications that use pcap_offline_filter() or bpf_filter() with an externally-supplied compiled filter program without validating the program first."}], "credits": [{"lang": "en", "type": "finder", "value": "Denis Ovsienko"}], "descriptions": [{"lang": "en", "value": "libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero."}], "exploits": [{"lang": "en", "value": "A functional exploit exists."}], "metrics": [{"cvssV3_1": {"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"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-369", "description": "CWE-369 Divide By Zero", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:50:39.649Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19"}], "solutions": [{"lang": "en", "value": "Upgrade to libpcap 1.10.7."}], "source": {"discovery": "INTERNAL"}, "title": "division by zero in libpcap before 1.10.7", "workarounds": [{"lang": "en", "value": "Validate every filter program that has not been produced by a local call to pcap_compile()."}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T15:13:24.317855Z", "id": "CVE-2026-6244", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T15:13:31.774Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-6244", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T15:13:24.317855Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T15:13:28.143Z"}}], "cna": {"title": "division by zero in libpcap before 1.10.7", "source": {"discovery": "INTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Denis Ovsienko"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "modules": ["BPF interpreter"], "product": "libpcap", "versions": [{"status": "affected", "version": "0", "lessThan": "1.10.7", "versionType": "semver"}], "programFiles": ["bpf_filter.c"], "defaultStatus": "unaffected", "programRoutines": [{"name": "pcapint_filter_with_aux_data()"}]}], "exploits": [{"lang": "en", "value": "A functional exploit exists."}], "solutions": [{"lang": "en", "value": "Upgrade to libpcap 1.10.7."}], "references": [{"url": "https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19", "tags": ["patch"]}], "workarounds": [{"lang": "en", "value": "Validate every filter program that has not been produced by a local call to pcap_compile()."}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-369", "description": "CWE-369 Divide By Zero"}]}], "configurations": [{"lang": "en", "value": "The problem is specific to applications that use pcap_offline_filter() or bpf_filter() with an externally-supplied compiled filter program without validating the program first."}], "providerMetadata": {"orgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "shortName": "Tcpdump", "dateUpdated": "2026-09-05T18:50:39.649Z"}}}, "cveMetadata": {"cveId": "CVE-2026-6244", "state": "PUBLISHED", "dateUpdated": "2026-09-08T15:13:31.774Z", "dateReserved": "2026-04-13T17:26:27.568Z", "assignerOrgId": "cfdbb673-b408-4d03-89c1-c3d73ed80896", "datePublished": "2026-09-05T18:50:39.649Z", "assignerShortName": "Tcpdump"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["BPF interpreter"], "product": "libpcap", "programFiles": ["bpf_filter.c"], "programRoutines": [{"name": "pcapint_filter_with_aux_data()"}], "repo": "https://github.com/the-tcpdump-group/libpcap/", "vendor": "The Tcpdump Group", "versions": [{"lessThan": "1.10.7", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@tcpdump.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero."}], "id": "CVE-2026-6244", "lastModified": "2026-09-08T19:20:25.117", "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": "security@tcpdump.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6244", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T15:13:24.317855Z", "version": "2.0.3"}}]}, "published": "2026-09-05T19:16:55.950", "references": [{"source": "security@tcpdump.org", "url": "https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19"}], "sourceIdentifier": "security@tcpdump.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-369"}], "source": "security@tcpdump.org", "type": "Secondary"}]}

{"bugzilla": {"description": "libpcap: libpcap: Denial of Service via crafted BPF filter program", "id": "2529094", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529094"}, "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-369", "details": ["libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero.", "A flaw was found in libpcap. The Berkeley Packet Filter (BPF) interpreter's 'div #k' and 'mod #k' instructions do not validate if the immediate value 'k' is zero. A local attacker with low privileges could exploit this by providing a specially crafted filter program, leading to a division-by-zero error. This could result in a denial of service (DoS) for the affected system."], "name": "CVE-2026-6244", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libpcap", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-05T18:50:39Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6244\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6244\nhttps://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.10.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "libpcap", "source": "cna", "vendor": "The Tcpdump Group"}, "product": "libpcap", "vendor": "tcpdump"}], "created": "2026-09-05T21:00:05.102753+00:00", "updated": "2026-09-07T08:24:59.248709+00:00", "vendors": ["tcpdump", "tcpdump$PRODUCT$libpcap"]}