{"id":"CVE-2026-0799","summary":"OOBR and OOBW in libpcap before 1.10.7","details":"In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value.  In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.","modified":"2026-09-11T18:26:41.182703461Z","published":"2026-09-05T18:48:39.126Z","related":["openSUSE-SU-2026:11744-1"],"database_specific":{"cna_assigner":"Tcpdump","cwe_ids":["CWE-125","CWE-129","CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0799.json"},"references":[{"type":"WEB","url":"https://github.com/the-tcpdump-group/libpcap/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0799.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0799"},{"type":"FIX","url":"https://github.com/the-tcpdump-group/libpcap/commit/48e8960a7108e9e828f9d7bdc7e97bdab841aec7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/the-tcpdump-group/libpcap","events":[{"introduced":"0"},{"fixed":"48e8960a7108e9e828f9d7bdc7e97bdab841aec7"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"1.10.7"}]}}],"versions":["libpcap-1.10.6","libpcap-1.10.5","libpcap-1.10.4","libpcap-1.10.3","libpcap-1.10.2","libpcap-1.10.1","libpcap-1.10.0","libpcap-1.10-bp","libpcap-1.9-bp","libpcap-1.9.0-rc1","libpcap-1.8.1","libpcap-1.8.0-bp","libpcap-1.7.0-bp","libpcap-0.8-bp","libpcap-0.7.1","libpcap-0.6.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-0799.json","vanir_signatures_modified":"2026-09-11T14:11:44Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/the-tcpdump-group/libpcap/commit/48e8960a7108e9e828f9d7bdc7e97bdab841aec7","target":{"file":"bpf_filter.c"},"deprecated":false,"digest":{"line_hashes":["93496371634338935195273087524799309489","76943592959768625155189410777882494755","147893165603774244095237422567562512939","189820924979698075619574152729715658249","279432880534192196461142181033305033635","183954662133259190767489492183233197373","231126789456780287462037331576936745249","299308225669883024026534814903705044323","76000364153852106174084685411664720442","66549812011853300350068554423228137207","87623451611845008472217439363246227579","265168526583298404141911923457073807916","79467085003847351206664676536906302276"],"threshold":0.9},"id":"CVE-2026-0799-0267fb7c","signature_type":"Line"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H"}]}