CVE-2026-0799
High · 8.7CVSS
8.7
EPSS
0.1%
Published
Sep 5, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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