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.
在 BPF 指令中，当从/向临时内存寄存器加载/存储值时，寄存器索引是一个无符号 32 位整数，且其值不得超过 15，但 libpcap 的 BPF 解释器未对该值进行校验。特别地，在某些不常见的使用场景中，一个精心构造的过滤程序可能导致解释器在 64 位架构上尝试读取和写入当前栈帧起始处起的 16GiB 的操作系统进程内存，而在 32 位架构上则可能涉及整个地址空间。
Possible ATT&CK Techniques 1 AI
T1027 · Obfuscated Files or InformationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The Tcpdump Group | libpcap | 0 ~ 1.10.7 | - |
|
II. Public POCs for CVE-2026-0799
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-0799 (1)
Same Patch Batch · The Tcpdump Group · 2026-09-05 · 7 CVEs total
| CVE-2026-6244 | 5.5 MEDIUM | division by zero in libpcap before 1.10.7 |
| CVE-2026-6554 | 5.5 MEDIUM | infinte loop 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
-
CVE-2026-18238
OOBR in rpcap client in libpcap before 1.10.7 -
CVE-2026-18313
rpcapd memory leak in libpcap before 1.10.7 -
CVE-2026-6554
infinte loop in libpcap before 1.10.7 -
CVE-2026-6244
division by zero in libpcap before 1.10.7 -
CVE-2026-31911
abort() in libpcap before 1.10.7 on an invalid BPF opcode
Same vendor: The Tcpdump Group
-
CVE-2026-18238
OOBR in rpcap client in libpcap before 1.10.7 -
CVE-2026-18313
rpcapd memory leak in libpcap before 1.10.7 -
CVE-2026-6554
infinte loop in libpcap before 1.10.7 -
CVE-2026-6244
division by zero in libpcap before 1.10.7 -
CVE-2026-31911
abort() in libpcap before 1.10.7 on an invalid BPF opcode
Same weakness: CWE-129
-
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PJSIP: SDP parser out-of-bounds write in remote payload-type -
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AMD Radeon 输入验证错误漏洞 -
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Libsolv: libsolv: out-of-bounds write in repo_write() via un -
CVE-2026-79775
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CVE-2026-13212
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V. Comments for CVE-2026-0799
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