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CVE-2026-15390— Out-of-bounds write in Das U-Boot

Quick assessment

Affected
DENX Software Engineering Das U-Boot
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.

当 U-Boot 配置了 参数时，在成功重组并交付完整的 IP 数据报后，未能清除 IP 重组状态。能够发送分片 IP 流量的攻击者，可以通过发送重复的最后一个分片（last-fragment）IP 数据包来执行任意代码。 该问题已在版本 2026.07 中通过提交 b1aec609bb5e0d08c25c888c91935287ab4ee5fa 修复。

CVSS 9.0 · Critical

Possible ATT&CK Techniques 1 AI

T1059.004 · Unix Shell
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I. Basic Information for CVE-2026-15390

Vulnerability Information
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Vulnerability Title
Out-of-bounds write in Das U-Boot
Source: CVE Program / CVE List V5
Vulnerability Description
Das U-Boot with CONFIG_IP_DEFRAG=y parameter fails to clear IP reassembly state after delivering a complete datagram. An attacker who can deliver fragmented IP traffic can execute arbitrary code by sending duplicated last-fragment IP packets. This issue was fixed in commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa in version 2026.07.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
DENX Software Engineering Das U-Boot 2009.08 ~ 2026.07 -

II. Public POCs for CVE-2026-15390

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III. Intelligence Information for CVE-2026-15390

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Other References for CVE-2026-15390 (2)

IV. Related Vulnerabilities

Same product: Das U-Boot
Same vendor: DENX Software Engineering
Same weakness: CWE-787

V. Comments for CVE-2026-15390

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