{"id":"CVE-2026-31912","title":"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","summary":"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 …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125","CWE-823","CWE-1285"],"vendor":"The Tcpdump Group","product":"libpcap","affected":["libpcap < 1.10.7"],"published":"2026-09-05","updated":"2026-09-08","sourceUpdated":"2026-09-08T19:20:25.117","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-31912","references":[{"url":"https://github.com/the-tcpdump-group/libpcap/commit/d3f358d3cffbe1ecb94d5284b3e81f052a0adcb9","label":"security@tcpdump.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31912.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-31912"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529088"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31912"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31912"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T18:21:42.914503Z"},"epss":0.00098,"epssPercentile":0.00891,"ingestedAt":"2026-09-06T10:53:52.164Z","scores":{"nvd":5.5,"vendor":6.1,"cna":5.5},"slug":"CVE-2026-31912","body":"## Overview\n\nlibpcap 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31912.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}