| Name | CVE-2026-31911 |
| Description | libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode. In particular uncommon use cases a crafted filter program can terminate the OS process. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1146825 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libpcap (PTS) | bookworm | 1.10.3-1 | vulnerable |
| trixie | 1.10.5-2 | vulnerable |
| forky, sid | 1.10.7-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libpcap | source | (unstable) | 1.10.7-1 | | | 1146825 |
Notes
[trixie] - libpcap <no-dsa> (Minor issue)
[bookworm] - libpcap <postponed> (Minor issue, requires running a malicious BPF program)
Fixed by: https://github.com/the-tcpdump-group/libpcap/commit/a715bcdde830299cba4171514385cb17ec19b6e9 (libpcap-1.10.7)
https://www.openwall.com/lists/oss-security/2026/09/09/2