CVE-2026-31912 (Medium) detected in multiple libraries

[mend-bolt-for-github]

CVE-2026-31912 - Medium Severity Vulnerability

Vulnerable Libraries - libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5, libpcaplibpcap-1.10.5

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

Library home page: https://github.com/salewski/libpcap.git

Vulnerable Source Files (9)

/contrib/libpcap/pcap-netmap.c
/contrib/libpcap/pcap-dpdk.c
/contrib/libpcap/pcap-npf.c
/contrib/libpcap/pcap-linux.c
/contrib/libpcap/pcap-bt-linux.c
/contrib/libpcap/pcap-rdmasniff.c
/contrib/libpcap/pcap-dbus.c
/contrib/libpcap/bpf_filter.c
/contrib/libpcap/pcap.c

Found in base branches: stable/4.0, master

Vulnerability Details

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.

Publish Date: 2026-09-05

URL: CVE-2026-31912

CVSS 3 Score Details (5.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-09-05

Fix Resolution: https://github.com/the-tcpdump-group/libpcap.git - libpcap-1.10.7

---

Step up your Open Source Security Game with Mend here