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CVE-2026-84484— ION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnv

Quick assessment

Affected
nasa-jpl ION-DTN
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.

该漏洞描述翻译如下（中文）： ION-DTN 4.2.0 之前的版本在 函数中存在越界读取漏洞，未经身份验证的远程攻击者可以通过发送截断的 SDNV 值来读取内存。攻击者可以向 LTP 链路服务输入端口发送一个 UDP 数据报，其中包含截断的 SDNV，从而触发读取缓冲区边界之外最多 9 个字节，并导致字节计数器下溢。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2026-84484

Vulnerability Information
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Vulnerability Title
ION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnv
Source: CVE Program / CVE List V5
Vulnerability Description
ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nasa-jpl ION-DTN 0 ~ 4.2.0 -

II. Public POCs for CVE-2026-84484

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III. Intelligence Information for CVE-2026-84484

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Patches & Fixes for CVE-2026-84484 (1)

Vendor Advisories for CVE-2026-84484 (2)

Proof of Concept for CVE-2026-84484 (1)

Vendor Pages for CVE-2026-84484 (1)

IV. Related Vulnerabilities

Same product: ION-DTN
Same vendor: nasa-jpl
Same weakness: CWE-125

V. Comments for CVE-2026-84484

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