VULNERABILITY INTELLIGENCE

CVE-2026-0799

CVSS score8.7 HIGH
EPSS probability0.11%
CISA KEVNot currently listed
Published2026-09-05
Last modified2026-09-08
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H

Description

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.

Weakness classification

  • CWE-125: Out-of-bounds Read
  • CWE-129: Improper Validation of Array Index
  • CWE-787: Out-of-bounds Write

Primary references