{"id":"CVE-2026-6244","state":"PUBLISHED","title":"division by zero in libpcap before 1.10.7","description":"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.","publishedAt":"2026-09-05T18:50:39.649Z","updatedAt":"2026-09-17T07:35:54.622Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"Tcpdump"},"assigner":"Tcpdump","products":["The Tcpdump Group libpcap"],"affected":[{"vendor":"The Tcpdump Group","product":"libpcap","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.10.7","versionType":"semver"}],"modules":["BPF interpreter"],"programFiles":["bpf_filter.c"],"programRoutines":[{"name":"pcapint_filter_with_aux_data()"}],"repo":"https://github.com/the-tcpdump-group/libpcap/"}],"references":["https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19"],"weaknesses":["CWE-369"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6244.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6244","state":"PUBLISHED","datePublished":"2026-09-05T18:50:39.649Z","dateUpdated":"2026-09-17T07:35:54.622Z","assignerShortName":"Tcpdump","assignerOrgId":"cfdbb673-b408-4d03-89c1-c3d73ed80896","dateReserved":"2026-04-13T17:26:27.568Z"},"containers":{"cna":{"title":"division by zero in libpcap before 1.10.7","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."}],"affected":[{"vendor":"The Tcpdump Group","product":"libpcap","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.10.7","versionType":"semver"}],"modules":["BPF interpreter"],"programFiles":["bpf_filter.c"],"programRoutines":[{"name":"pcapint_filter_with_aux_data()"}],"repo":"https://github.com/the-tcpdump-group/libpcap/"}],"references":[{"url":"https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19","tags":["patch"]}],"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":{"shortName":"Tcpdump","orgId":"cfdbb673-b408-4d03-89c1-c3d73ed80896","dateUpdated":"2026-09-17T07:35:54.622Z"},"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":"reporter","value":"Aniruddhan Murali"},{"lang":"en","type":"reporter","value":"Noble Saji Mathews"},{"lang":"en","type":"analyst","value":"Denis Ovsienko"}],"exploits":[{"lang":"en","value":"A functional exploit exists."}],"solutions":[{"lang":"en","value":"Upgrade to libpcap 1.10.7."}],"source":{"discovery":"INTERNAL"},"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":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-08T15:13:31.774Z"}}]}}}