CVE-2026-14697— zephyrproject Zephyr 资源管理错误漏洞
一分钟漏洞结论
影响对象
zephyrproject zephyr
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
zephyrproject Zephyr是zephyrproject组织开源的一款面向物联网设备的实时操作系统。 zephyrproject Zephyr 4.3.0版本至4.4.2之前版本存在资源管理错误漏洞，该漏洞源于subsys/net/ip/ipv6_nbr.c中的net_ipv6_send_ns()函数在邻居解析未完成且待处理队列非空时，未发送邻居请求也未释放分配的net_pkt，导致内存泄漏，攻击者可通过发送突发ICMPv6或UDP请求包耗尽传输池，造成持久拒绝服务。
可能的 ATT&CK 技术 1 AI
T1499.004 · Application or System Exploitation影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| zephyrproject | zephyr | 4.3.0< 4.4.2 |
affected |
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一、 漏洞 CVE-2026-14697 基础信息
漏洞信息
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Vulnerability Title
IPv6 Neighbor Solicitation packet leak causes TX pool exhaustion denial of service
来源: CVE Program / CVE List V5
Vulnerability Description
net_ipv6_send_ns() in subsys/net/ip/ipv6_nbr.c allocates a transmit net_pkt for a Neighbor Solicitation. When it is called with a data packet pending on an unresolved neighbor and that neighbor's pending_queue is already non-empty (an NS is already outstanding), the function appends the data packet and returns early without ever sending the NS via net_send_data() or releasing it with net_pkt_unref(). The freshly allocated NS net_pkt and its attached TX buffers are held only by a local variable and are leaked permanently, never returning to CONFIG_NET_PKT_TX_COUNT / CONFIG_NET_BUF_TX_COUNT.
The leaking branch sits on the normal IPv6 transmit path: net_ipv6_prepare_for_send() (called from net_if.c) invokes net_ipv6_send_ns() for any outbound or forwarded IPv6 packet whose next hop is not yet in the neighbor cache. An on-link (adjacent) attacker can drive it deterministically by sending a burst of request packets (for example ICMPv6 echo requests or UDP datagrams) that all spoof a single non-existent on-link source address: the node generates a reply to each, the first reply queues an NS, and every subsequent reply during the roughly three-second INCOMPLETE resolution window takes the leaking branch and loses one TX packet. Router-configured nodes forwarding attacker traffic toward a non-existent on-link host leak identically.
Because the leaked packets are never reclaimed and CONFIG_NET_PKT_TX_COUNT defaults to only 4 (14 for Ethernet), a brief low-rate burst exhausts the TX pool. Once exhausted the node can no longer allocate any transmit packet and cannot send TCP/UDP, ARP/ND, or any reply at all, producing a complete and persistent network denial of service that does not self-heal until reboot. The fix releases the unsent NS packet with net_pkt_unref(pkt) before the early return.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
来源: CVE Program / CVE List V5
Vulnerability Title
zephyrproject Zephyr 资源管理错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
zephyrproject Zephyr是zephyrproject组织开源的一款面向物联网设备的实时操作系统。 zephyrproject Zephyr 4.3.0版本至4.4.2之前版本存在资源管理错误漏洞，该漏洞源于subsys/net/ip/ipv6_nbr.c中的net_ipv6_send_ns()函数在邻居解析未完成且待处理队列非空时，未发送邻居请求也未释放分配的net_pkt，导致内存泄漏，攻击者可通过发送突发ICMPv6或UDP请求包耗尽传输池，造成持久拒绝服务。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| zephyrproject | zephyr | 4.3.0 ~ 4.4.2 | - |
|
二、漏洞 CVE-2026-14697 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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CVE-2026-14697 补丁与修复 (1)
CVE-2026-14697 厂商安全公告 (1)
同批安全公告 · zephyrproject · 2026-08-31 · 共 5 条
| CVE-2026-14696 | 6.5 MEDIUM | zephyrproject Zephyr 资源管理错误漏洞 |
| CVE-2026-14366 | 6.4 MEDIUM | zephyrproject Zephyr 资源管理错误漏洞 |
| CVE-2026-14368 | 5.4 MEDIUM | zephyrproject Zephyr 数字错误漏洞 |
| CVE-2026-14367 | 3.1 LOW | zephyrproject Zephyr 竞争条件问题漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-14697
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