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CVE-2026-0799— OOBR and OOBW in libpcap before 1.10.7

Quick assessment

Affected
The Tcpdump Group libpcap
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

The Tcpdump Group LIBPCAP是The Tcpdump Group组织的一个网络数据包捕获函数库。 The Tcpdump Group LIBPCAP 1.10.7之前版本存在安全漏洞，该漏洞源于BPF解释器未验证暂存内存寄存器的索引值，特制过滤器程序可导致解释器读写操作系统进程内存（64位架构为当前栈帧起始的16GiB内存，32位架构为整个地址空间）。

CVSS 8.7 · High EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1027 · Obfuscated Files or Information

Affected Version Matrix 1

VendorProduct Version RangeStatus
The Tcpdump Group libpcap < 1.10.7 affected
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I. Basic Information for CVE-2026-0799

Vulnerability Information
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Vulnerability Title
OOBR and OOBW in libpcap before 1.10.7
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
The Tcpdump Group LIBPCAP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
The Tcpdump Group LIBPCAP是The Tcpdump Group组织的一个网络数据包捕获函数库。 The Tcpdump Group LIBPCAP 1.10.7之前版本存在安全漏洞，该漏洞源于BPF解释器未验证暂存内存寄存器的索引值，特制过滤器程序可导致解释器读写操作系统进程内存（64位架构为当前栈帧起始的16GiB内存，32位架构为整个地址空间）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
The Tcpdump Group libpcap 0 ~ 1.10.7 -

II. Public POCs for CVE-2026-0799

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III. Intelligence Information for CVE-2026-0799

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Patches & Fixes for CVE-2026-0799 (1)

Same Patch Batch · The Tcpdump Group · 2026-09-05 · 7 CVEs total

CVE-2026-6554 7.5 HIGH infinte loop in libpcap before 1.10.7
CVE-2026-6244 5.5 MEDIUM division by zero in libpcap before 1.10.7
CVE-2026-31911 5.5 MEDIUM abort() in libpcap before 1.10.7 on an invalid BPF opcode
CVE-2026-31912 5.5 MEDIUM OOBR in libpcap before 1.10.7
CVE-2026-18238 5.0 MEDIUM OOBR in rpcap client in libpcap before 1.10.7
CVE-2026-18313 4.3 MEDIUM rpcapd memory leak in libpcap before 1.10.7

IV. Related Vulnerabilities

Same product: libpcap
Same vendor: The Tcpdump Group
Same weakness: CWE-129

V. Comments for CVE-2026-0799

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