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.
Metrics
Affected Vendors & Products
References
History
Wed, 09 Sep 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Tue, 08 Sep 2026 19:30:00 +0000
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ssvc
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Mon, 07 Sep 2026 08:45:00 +0000
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Tcpdump
Tcpdump libpcap |
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Tcpdump
Tcpdump libpcap |
Sat, 05 Sep 2026 19:00:00 +0000
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| 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. | |
| Title | OOBR and OOBW in libpcap before 1.10.7 | |
| Weaknesses | CWE-125 CWE-129 CWE-787 |
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cvssV3_1
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Status: PUBLISHED
Assigner: Tcpdump
Published: 2026-09-05T18:48:39.126Z
Updated: 2026-09-08T18:20:50.106Z
Reserved: 2026-01-08T23:19:31.855Z
Link: CVE-2026-0799
Updated: 2026-09-08T18:20:39.994Z
Status : Awaiting Analysis
Published: 2026-09-05T19:16:55.320
Modified: 2026-09-08T19:20:25.117
Link: CVE-2026-0799