CVE-2026-31912 Affecting libpcap package, versions <1.10.7-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.11% (1st percentile)

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  • Snyk IDSNYK-ALPINE323-LIBPCAP-19638128
  • published7 Sept 2026
  • disclosed5 Sept 2026

Introduced: 5 Sep 2026

NewCVE-2026-31912  (opens in a new tab)

How to fix?

Upgrade Alpine:3.23 libpcap to version 1.10.7-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libpcap package and not the libpcap package as distributed by Alpine. See How to fix? for Alpine:3.23 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1