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CVE-2026-108518— DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element

Quick assessment

Affected
CVE-2026-108518
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 Perl 的 DBI 模块 1.656 版本之前，当数据库句柄在包含 元素的 Profile Path 下被销毁时，dbi_profile 组件会因类型混淆（type confusion）而导致崩溃。 元素用于指定数据库句柄的某个属性，dbi_profile 会从句柄的内部哈希表中读取该属性。该组件预期内部句柄是一个引用，因此会对其进行解引用；然而，正在被销毁的句柄返回的是其内部哈希表本身，导致解引用操作得到的是哈希表的桶数组（bucket array）。通常情况下，对该指针的类型检查会失败，调用不会被记录（u

AI Predicted 8.1 Difficulty: Trivial

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

I. Basic Information for CVE-2026-108518

Vulnerability Information
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Vulnerability Title
DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element
Source: CVE Program / CVE List V5
Vulnerability Description
DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element. An {attr} element names a database handle attribute, which dbi_profile reads from the handle's inner hash. It expects the inner handle as a reference and dereferences it, but a handle that is being destroyed hands back the inner hash itself, so the dereference yields the hash's bucket array. A type check on that pointer usually fails and the call goes unprofiled. When the memory it addresses passes the check, the attribute lookup dereferences a NULL or invalid pointer and the process dies on SIGSEGV. The Path is set by the application, by the Profile handle attribute, or by the DBI_PROFILE environment variable, so `DBI_PROFILE={ImplementorClass}` can crash an unmodified program.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 1.656 -

II. Public POCs for CVE-2026-108518

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III. Intelligence Information for CVE-2026-108518

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Patches & Fixes for CVE-2026-108518 (1)

Vendor Advisories for CVE-2026-108518 (1)

Other References for CVE-2026-108518 (1)

IV. Related Vulnerabilities

Same weakness: CWE-843

V. Comments for CVE-2026-108518

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