CVE-2026-0799 Affecting libpcap package, versions <14:1.10.0-4.el9_8.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-ALMALINUX9-LIBPCAP-20413817
  • published3 Oct 2026
  • disclosed1 Oct 2026

Introduced: 1 Oct 2026

NewCVE-2026-0799  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 libpcap to version 14:1.10.0-4.el9_8.1 or higher.
This issue was patched in ALSA-2026:74441.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libpcap package and not the libpcap package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.

CVSS Base Scores

version 3.1