CVE-2026-6554 (Medium) detected in libpcaplibpcap-1.10.5

[mend-bolt-for-github]

CVE-2026-6554 - Medium Severity Vulnerability

Vulnerable Library - libpcaplibpcap-1.10.5

the LIBpcap interface to various kernel packet capture mechanism

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

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/contrib/libpcap/bpf_filter.c

Vulnerability Details

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.

Publish Date: 2026-09-05

URL: CVE-2026-6554

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

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