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CVE-2026-0799 on Cyberus Linux 26.05

Aliases: CVE-2026-0799

Packages: libpcap

Status: Plausible

Advisory Information

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.

Updates

2026-09-09 21:29 CEST

Metadata changes:

  • Status for package libpcap: “Plausible”

2026-09-09 21:29 CEST

Metadata changes:

  • Status for package libpcap: “New”