CVE-2026-0799
OOBR and OOBW in libpcap before 1.10.7
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-129 CWE-125 CWE-787 |
| Vendor | the tcpdump group |
| Product | libpcap |
| Published | Sep 5, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
High
Affected Versions
The Tcpdump Group / libpcap
0 < 1.10.7
References
Credits
Mozilla via the Secure Open Source program 🔍 Include Security Denis Ovsienko