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In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures."}],"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-1285","description":"CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-823","description":"CWE-823 Use of Out-of-range Pointer Offset","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-05T18:49:41.619Z","orgId":"cfdbb673-b408-4d03-89c1-c3d73ed80896","shortName":"Tcpdump"},"references":[{"tags":["patch"],"url":"https://github.com/the-tcpdump-group/libpcap/commit/d3f358d3cffbe1ecb94d5284b3e81f052a0adcb9"}],"solutions":[{"lang":"en","value":"Upgrade to libpcap 1.10.7 and migrate from bpf_filter() to pcap_offline_filter()."}],"source":{"discovery":"INTERNAL"},"title":"OOBR in libpcap before 1.10.7","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"cfdbb673-b408-4d03-89c1-c3d73ed80896","assignerShortName":"Tcpdump","cveId":"CVE-2026-31912","datePublished":"2026-09-05T18:49:41.619Z","dateReserved":"2026-03-10T09:30:50.972Z","dateUpdated":"2026-09-05T18:49:41.619Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-05 19:16:55","lastModifiedDate":"2026-09-05 19:16:55","problem_types":["CWE-125","CWE-823","CWE-1285","CWE-1285 CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input","CWE-823 CWE-823 Use of Out-of-range Pointer Offset","CWE-125 CWE-125 Out-of-bounds Read"],"metrics":{"cvssMetricV31":[{"source":"security@tcpdump.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31912","Ordinal":"1","Title":"OOBR in libpcap before 1.10.7","CVE":"CVE-2026-31912","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31912","Ordinal":"1","NoteData":"libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer.  In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.","Type":"Description","Title":"OOBR in libpcap before 1.10.7"}]}}}