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CVE-2026-121508— Use After Free in µD3TN

Quick assessment

Affected
D3TN GmbH µD3TN
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.

µD3TN BPv6 分片器清理过程中存在释放后使用（Use-After-Free）漏洞，允许未认证的远程攻击者在分配失败时触发拒绝服务（DoS）攻击。

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-121508

Vulnerability Information
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Vulnerability Title
Use After Free in µD3TN
Source: CVE Program / CVE List V5
Vulnerability Description
Use-After-Free in µD3TN BPv6 Fragmenter Cleanup allows Unauthenticated Remote Attacker to Cause DoS on Allocation Failure
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
D3TN GmbH µD3TN 0 ~ 0.15.2 -

II. Public POCs for CVE-2026-121508

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-121508

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Other References for CVE-2026-121508 (1)

Same Patch Batch · D3TN GmbH · 2026-11-03 · 6 CVEs total

CVE-2026-121510 7.5 HIGH Out-of-bounds Write in µD3TN
CVE-2026-121513 7.5 HIGH Out-of-bounds Write in µD3TN
CVE-2026-121512 7.5 HIGH Missing Release of Memory after Effective Lifetime in µD3TN
CVE-2026-121511 7.1 HIGH Out-of-bounds Read in µD3TN
CVE-2026-121507 5.9 MEDIUM Double Free in µD3TN

IV. Related Vulnerabilities

Same product: µD3TN
Same vendor: D3TN GmbH
Same weakness: CWE-416