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CVE-2026-109618— RCE via OOM corruption

Quick assessment

Affected
PHP Group PHP
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.

PHP 使用 来处理内存不足（OOM）错误，以退出当前上下文并中止请求的处理流程。然而，某些上下文可能未正确处理此类场景，导致在尝试进行内存分配之前，请求内存仍处于未初始化状态。随后的请求清理过程可能会读取或基于该未初始化的内存进行分支判断。多种 OOM 处理策略可稳定触发此条件，进而导致远程代码执行（RCE）漏洞。

CVSS 9.2 · Critical

Affected Version Matrix 4

VendorProduct Version RangeStatus
PHP Group PHP 8.2.*< 8.2.35 affected
8.3.*< 8.3.36 affected
8.4.*< 8.4.27 affected
8.5.*< 8.5.12 affected
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I. Basic Information for CVE-2026-109618

Vulnerability Information
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Vulnerability Title
RCE via OOM corruption
Source: CVE Program / CVE List V5
Vulnerability Description
PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
PHP Group PHP 8.2.* ~ 8.2.35 -

II. Public POCs for CVE-2026-109618

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III. Intelligence Information for CVE-2026-109618

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Other References for CVE-2026-109618 (1)

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-416

V. Comments for CVE-2026-109618

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