CVE-2026-0799
OOBR and OOBW in libpcap before 1.10.7
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 5, 2026
- Updated
- Sep 8, 2026
- Reserved
- Jan 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.7 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H | Tcpdump |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libpcapThe Tcpdump Group |
|
References
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